Sun Fire X4170, X4270, and X4275 Servers Service Manual

This chapter describes how to replace the motherboard and its components in the Sun Fire X4170, X4270, and X4275 Servers.

The following topics are covered in this chapter:

• Servicing Memory Modules (DIMMs)
• Servicing the Air Baffle on Sun Fire X4270 and X4275 Servers
• Servicing PCIe Risers
• Servicing PCIe Cards
• Servicing the Battery
• Servicing CPUs
• Servicing the Motherboard Assembly
• Resetting Passwords and Clearing CMOS NVRAM

Caution - Never attempt to run the server with the top cover removed. Hazardous voltage present.

Caution - Equipment damage possible. The top cover must be in place for proper airflow.

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4.1 Servicing Memory Modules (DIMMs)

Caution - These procedures require that you handle components that are sensitive to static discharge. This sensitivity can cause the component to fail. To avoid damage, ensure that you follow antistatic practices as described in Performing Electrostatic Discharge and Antistatic Prevention Measures.

Caution - Ensure that all power is removed from the server before removing or installing DIMMs, or damage to the DIMMs might occur. You must disconnect all power cables from the system before performing this procedure.

The Sun Fire X4170, X4270, and X4275 Servers support a variety of DIMM configurations that can include quad-rank (QR) DIMMs, dual-rank (DR) DIMMs, or single-rank (SR) DIMMs. When replacing or upgrading a DIMM on the server you should consider the following:

• DIMM and CPU physical layout

For details, see DIMM and CPU Physical Layout.

• DIMM population rules

For details, see DIMM Population Rules.

• DIMM rank classification labels

For details, see DIMM Rank Classification Labels.

• Locating Faulty DIMMs using ILOM versus BIOS

For details, see Locations of Faulty DIMMs Using ILOM Versus BIOS.

• Instructions for removing a faulty DIMM

For details, see Remove Faulty DIMMs.

• Instructions for installing a DIMM

For details, see Install DIMMs.

• Memory Error Correction and Parity

For details, see Error Correction and Parity.

4.1.1 DIMM and CPU Physical Layout

The physical layout of the DIMMs and CPUs is shown in FIGURE 4-1 and TABLE 4-1.

FIGURE 4-1 CPU and DIMM Physical Layout

4.1.2 DIMM Population Rules

The DIMM population rules for the Sun Fire X4170, X4270, and X4275 Servers are as follows:

1. Do not populate any DIMM sockets next to an empty CPU socket. Each processor contains a separate memory controller.

2. Each CPU can support a maximum of:

• Nine dual-rank (DR) or single-rank (SR) DIMMs; or
• Six quad-rank (QR) DIMMs with two per memory channel; or
• Three QR DIMMs with one per channel and three DR or SR DIMMs.

3. Populate DIMMs by location according to the following rules:

• Populate the DIMM slots for each memory channel that are the farthest from the CPU first.

For example, populate D8/D5/D2 first; then D7/D4/D1 second; and finally, D6/D3/D0. See FIGURE 4-1.

• Populate QR DIMMs first, followed by SR or DR DIMMs.
• Populate QR DIMMs in blue sockets (D8/D5/D2) first then white sockets (D7/D4/D1). See FIGURE 4-1.

Note that QR DIMMs are supported only in white sockets if adjacent blue socket contains a QR DIMM.

• Populate QR, SR, or DR DIMMs in sets of three for each CPU, one per memory channel. See FIGURE 4-1.

4. For maximum performance, apply the following rules:

• The best performance is ensured by preserving symmetry. For example: adding 3x of same kind DIMMs, one per memory channel; and, if the server has two CPUs, ensuring that both CPUs have the same size of DIMMs populated in the same manner.
• In certain configurations, DIMMs will run slower than their individual maximum speed. See TABLE 4-2 for further details.



TABLE 4-2 Memory Conside rations and Limitations

1	DIMMs are available in two speeds: 1066 MHz and 1333 MHz
2	DIMM speed rules are as follows: 3x of the same kind of DIMMs per channel = 800 MHz 2x of the same kind of DIMMs per channel = 1333 MHz (for single-rank and dual-rank DIMMs); = 800 MHz (for quad-rank DIMMs) 1x of the same kind of DIMMs per channel = 1333 MHz (if using 1333 MHz DIMMs)[1] 1x of the same kind of DIMMs per channel = 1066 MHz (if using 1066 MHz DIMMs)
3	The system operates all memory only as fast as the slowest DIMM configuration.

4.1.3 DIMM Rank Classification Labels

DIMMs come in a variety of ranks: single, dual, or quad. Each DIMM is shipped with a label identifying its rank classification. TABLE 4-3 identifies the corresponding rank classification label shipped with each DIMM.

4.1.4 Locations of Faulty DIMMs Using ILOM Versus BIOS

ILOM and BIOS use different formats to identify the location of a faulty DIMM.

• For ILOM, the format is Px/Dx, where x is 0 or 1 for CPUs, and 0 to 8 for DIMMs.
• For BIOS, the format is CPUx/CHANNELx/DIMMx, where x is 0 or 1 for CPUs, and 0 to 2 for channels and DIMMs.

TABLE 4-1 shows the mapping of faulty DIMM locations as reported by ILOM and BIOS.

4.1.5 Remove Faulty DIMMs

1. Prepare the server for service.

a. Power off the server and disconnect the power cord (or cords) from the server power supply (or supplies).

See Power Off the Server.

b. Extend the server into the maintenance position.

See Extending the Server to the Maintenance Position.

c. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

d. Remove the top cover.

See Removing the Top Cover.

2. Replace the faulty DIMM(s).

a. Identify the location of the faulty DIMMs by pressing the FAULT REMIND button on the motherboard (FIGURE 4-1).

• If DIMM Service Action Required LED is off: DIMM is operating properly.
• If DIMM Service Action Required LED is on (amber): DIMM is faulty and should be replaced.

FIGURE 4-1 FAULT REMIND Button

b. Note the location of faulty DIMMs.

Faulty DIMMs are identified with a corresponding amber LED on the motherboard.

c. To remove the faulty DIMM do the following:

i. Rotate both DIMM slot ejectors outward as far as they will go.

The DIMM is partially ejected from the socket (FIGURE 4-2).

ii. Carefully lift the DIMM straight up to remove it from the socket.

d. Replace each faulty DIMM with either another DIMM of the same rank size (quad rank, dual rank, or single rank) or a DIMM filler panel.

For DIMM replacement instructions, see Install DIMMs.

Caution - If you are not immediately inserting a replacement DIMM into the empty DIMM socket, you should insert a DIMM filler panel in the socket to ensure adequate cooling and reduce the possibility of a system shutdown.

FIGURE 4-2 DIMM Socket Release and Alignment

4.1.6 Install DIMMs

1. Unpack the replacement DIMMs and place them on an antistatic mat.

2. Ensure that the replacement DIMMs match the sizes as the DIMMs they are replacing.

You must not replace a dual-rank DIMM with a quad-rank DIMM and vice versa. If you violate this rule, the performance of the server might be adversely affected. For DIMM population rules, see “DIMM Population Rules” in the Sun Fire X4170, X4270, and X4275 Servers Installation Guide (820-5827).

3. Ensure that the ejector tabs are in the open position.

4. Line up the replacement DIMM with the connector (FIGURE 4-3).

Align the notch in the DIMM with the key in the connector. The notch ensures that the DIMM is oriented correctly.

FIGURE 4-3 Installing DIMMs

5. Push the DIMM into the connector until the ejector tabs lock the DIMM in place.

If the DIMM does not easily seat into the connector, verify that the notch in the DIMM is aligned with the key in the connector as shown in FIGURE 4-3. If the notch is not aligned, damage to the DIMM might occur.

6. Repeat Step 3 through Step 5 until all replacement DIMMs are installed.

7. Return the server to operation.

a. Install the top cover.

See Install Top Cover.

b. Slide the server into the rack.

See Returning the Server to the Normal Rack Position.

c. Reconnect the power cord (or cords) to the server power supply (or supplies) and power on the server.

See Powering On the Server.

Verify that the AC Present LED is lit.

8. Clear server DIMM faults.

a. To see server faults, log in to the server as root using ILOM CLI and type the following command list all known fault on the system:

-> Show /SP/faultmgmt

The server lists all known faults, for example:

SP/faultmgmt
  Targets:
      0 (/SYS/MB/P0/D2)
  Properties:
  Commands:
      cd
      show

b. To clear the fault type the following command:

-> set /SYS/MB/P0 clear_fault_action=true

For example:

-> set /SYS/MB/P0/D2 clear_fault_action=true
Are you sure you want to clear /SYS/MB/P0 9y/n)? y
Set ‘clear_fault_action” to ‘true’

4.1.7 Error Correction and Parity

The server’s processor provides parity protection on its internal cache memories and error-correcting code (ECC) protection of the data. The system can detect and log to the ILOM event log the following types of errors:

• Correctable and uncorrectable memory ECC errors
• Uncorrectable CPU internal errors

Advanced ECC corrects up to 4 bits in error on nibble boundaries, as long as they are all in the same DRAM. If a DRAM fails, the DIMM continues to function.

To clear a fault once the faulty DIMM has been replaced, type this ILOM CLI command:

-> set clear_fault_action=true

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4.2 Servicing the Air Baffle on Sun Fire X4270 and X4275 Servers

You must remove the air baffle when removing and installing the motherboard on Sun Fire X4270 and X4275 Servers. The Sun Fire X4170 server does not have an air baffle.

Caution - To prevent the system from overheating, ensure that the air baffle is correctly installed before powering on the server.

Caution - Ensure that all power is removed from the server before removing or installing DIMMs, or damage to the DIMMs might occur. You must disconnect all power cables from the system before performing this procedure.

4.2.1 Open Air Baffle

1. Prepare the server for service.

a. Power off the server and disconnect the power cord (or cords) from the server power supply (or supplies).

See Power Off the Server.

b. Slide the server out of the rack.

See Extending the Server to the Maintenance Position.

c. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

d. Remove the top cover.

See Removing the Top Cover.

2. Open the air baffle as shown in FIGURE 4-4.

Grasp the air baffle at the bottom and lift it up and out of the way.

FIGURE 4-4 Opening the Air Baffle

4.2.2 Remove Air Baffle

1. Prepare the server for service.

a. Power off the server and disconnect the power cord (or cords) from the server power supply (or supplies).

See Power Off the Server.

b. Slide the server out of the rack.

See Extending the Server to the Maintenance Position.

c. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

d. Remove the top cover.

See Removing the Top Cover.

2. Remove the air baffle as shown in FIGURE 4-5.

Press the air baffle connectors [1] outward and lift the air baffle up and out of the server [2].

FIGURE 4-5 Removing the Air Baffle

4.2.3 Install Air Baffle

Caution - When the server is in operation, ensure that the air baffle is correctly installed to prevent the system from overheating.

1. Install the air baffle into the chassis.

Press the air baffle connectors outward, place the air baffle in to the server, and lower it to its down position.

2. Return the server to operation.

a. Install the top cover.

See Install Top Cover.

b. Slide the server into the rack.

See Returning the Server to the Normal Rack Position.

c. Reconnect the power cord (or cords) to the server power supply (or supplies) and power on the server.

See Powering On the Server.

Verify that the AC Present LED is lit.

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4.3 Servicing PCIe Risers

PCIe cards are installed on vertical risers. You must remove the relevant riser to remove and replace a PCIe card. You must remove all three PCIe risers when replacing the motherboard.

Caution - These procedures require that you handle components that are sensitive to static discharge. This sensitivity can cause the component to fail. To avoid damage, ensure that you follow antistatic practices as described in Performing Electrostatic Discharge and Antistatic Prevention Measures.

Caution - Ensure that all power is removed from the server before removing or installing risers. You must disconnect the power cables before performing this procedure.

The following topics are covered in this section:

• Remove PCIe Riser From Sun Fire X4170 Server
• Install PCIe Riser on Sun Fire X4170 Server
• Remove PCIe Riser From Sun Fire X4270 and X4275 Servers
• Install PCIe Riser on Sun Fire X4270 and X4275 Servers

4.3.1 Remove PCIe Riser From Sun Fire X4170 Server

1. Prepare the server for service.

a. Power off the server and disconnect the power cord (or cords) from the power supply (or supplies).

See Power Off the Server.

b. Extend the server into the maintenance position.

c. See Extending the Server to the Maintenance PositionAttach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

d. Remove the top cover.

See Removing the Top Cover.

2. Disconnect any data cables connected to the PCIe card on the PCIe riser being removed.

Label the cables to ensure proper connection later.

3. Slide the server out of the rack.

See Extending the Server to the Maintenance Position.

4. If you are servicing a PCIe card, locate its position in the system.

5. Remove the back panel crossbar (FIGURE 4-6).

a. Loosen the captive Phillips screw on each end of the back panel crossbar.

b. Move the crossbar to the rear of the chassis and lift it up to remove it from the chassis.

FIGURE 4-6 Removing the Back Panel Crossbar From Sun Fire X4170 Server

6. Disconnect any internal cables connected to the PCIe card installed in the riser (FIGURE 4-7).

FIGURE 4-7 Disconnecting SAS PCIe Card Internal Cables

7. Remove the riser from the system (FIGURE 4-8).

a. Loosen the captive Phillips screw on the end of the riser [1].

b. Lift up the riser and the PCIe card attached to it, if any, as a unit [2].

The server has three PCIe risers. On the Sun Fire X4170 Server, each PCIe riser can house only one PCIe card.

FIGURE 4-8 Removing a Sun Fire X4170 Server PCIe Riser

4.3.2 Install PCIe Riser on Sun Fire X4170 Server

1. Lower the PCIe riser and any cards attached to it into the system.

2. Install the screw that secures the riser to the motherboard (FIGURE 4-9).

3. Install the back panel crossbar.

Slide the crossbar down over the PCIe risers. The crossbar is secured with two captive Phillips screws.

4. If any cards are attached to the PCIe riser, reconnect the cables that you unplugged during the removal procedure.

5. Return the server to operation.

a. Install the server top cover.

See Install Top Cover.

b. Slide the server into the rack.

See Returning the Server to the Normal Rack Position.

c. Connect any data cables you removed to service the PCIe cards.

d. Reconnect the power cord (or cords) to the power supply (or supplies) and power on the server.

See Powering On the Server.

Verify that the AC Present LED is lit.to the PCIe card.

FIGURE 4-9 Installing a PCIe Riser

4.3.3 Remove PCIe Riser From Sun Fire X4270 and X4275 Servers

1. Prepare the server for service.

a. Power off the server and disconnect the power cord (or cords) from the power supply (or supplies).

See Power Off the Server.

b. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

c. Remove the top cover.

See Removing the Top Cover.

2. Disconnect any data cables connected to the cards on the PCIe riser being removed.

Label the cables to ensure proper connection later.

3. Slide the server out of the rack.

See Extending the Server to the Maintenance Position.

4. If you are servicing a PCIe card, locate its position in the system.

5. Disconnect any data cables connected to the cards on the PCIe riser being removed.

Label the cables to ensure proper connection later.

6. Remove the back panel PCI crossbar (FIGURE 4-10).

a. Loosen the two captive Phillips screws on the end of the PCI crossbar [1].

b. Lift the PCI crossbar up and back to remove it from the chassis [2].

7. Loosen the captive retaining screw holding the riser to the motherboard (FIGURE 4-10 [2]).

8. Lift the riser up to remove it from the server.

Remove the riser and any PCIe cards attached to it as a unit.

FIGURE 4-10 Removing the PCIe Riser From Sun Fire X4270 and X4275 Servers

4.3.4 Install PCIe Riser on Sun Fire X4270 and X4275 Servers

Caution - Ensure that all power is removed from the server before removing or installing risers. You must disconnect the power cables before performing this procedure.

1. Lower the PCIe riser and any cards attached to it, if any, into the system (FIGURE 4-11).

2. Slide the back of the riser into the motherboard back panel stiffener.

3. Tighten the screw that secures the riser to the motherboard.

4. Install the back panel PCI crossbar.

a. Slide the crossbar down over the PCIe risers.

b. Ensure the PCI crossbar is secured with two captive Phillips screws.

5. Return the server to operation.

a. Install the server top cover.

See Install Top Cover.

b. Slide the server into the rack.

See Returning the Server to the Normal Rack Position.

c. Connect any data cables you removed to service the PCIe cards.

d. Reconnect the power cord (or cords) to the power supply (or supplies).

See Powering On the Server.

Verify that the AC Present LED is lit.

FIGURE 4-11 Installing the PCIe Riser on Sun Fire X4270 and X4275 Servers

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4.4 Servicing PCIe Cards

See PCIe Card Configuration Guidelines for PCIe card configuration guidelines.

Caution - These procedures require that you handle components that are sensitive to static discharge. This sensitivity can cause the component to fail. To avoid damage, ensure that you follow antistatic practices as described in Performing Electrostatic Discharge and Antistatic Prevention Measures.

Caution - Ensure that all power is removed from the server before removing or installing expansion cards. You must disconnect the power cables before performing these procedures.

The following topics are covered in this section:

• PCIe Card Configuration Guidelines
• Remove PCIe Card From Sun Fire X4170 Server
• Install PCIe Card on Sun Fire X4170 Server
• Remove PCIe Cards From Sun Fire X4270 and X4275 Servers
• Install PCIe Cards on Sun Fire X4270 and X4275 Servers

4.4.1 PCIe Card Configuration Guidelines

The PCI expansion system is configured using a variety of riser cards. The connector is an x16 but the cards may operate at x8.

4.4.2 Remove PCIe Card From Sun Fire X4170 Server

1. Prepare the server for service.

a. Power off the server and disconnect the power cord (or cords) from the power supply (or supplies).

See Power Off the Server.

b. Slide the server out of the rack.

See Extending the Server to the Maintenance Position.

c. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

d. Remove the top cover.

See Removing the Top Cover.

2. Locate the PCIe card that you want to remove, and note its corresponding riser board.

See Sun Fire X4170, X4270, and X4275 Servers Back Panel Features for more information about PCIe slots and their locations.

3. If necessary, make a note of where the PCIe cards are installed.

4. Unplug all data cables from the PCIe card.

To disconnect the cables from the PCIe card, press the latch, push in toward the connector, and then pull out to remove the cable.

Note the location of all cables for reinstallation later.

5. Remove the Phillips screw that secures the PCIe riser to the motherboard and remove the riser (FIGURE 4-12).

See Servicing PCIe Risers.

6. Carefully remove the PCIe card from the PCIe riser connector.

7. Place the PCIe card on an antistatic mat.

FIGURE 4-12 Removing a PCIe Card

8. If you are not replacing the PCIe card, install a PCIe filler panel.

PCIe filler panels are located in the motherboard back panel.

Insert the filler panel into the server’s back panel crossbar (see FIGURE 4-13).

FIGURE 4-13 Installing a PCIe Filler Panel on Sun Fire X4170 Server

4.4.3 Install PCIe Card on Sun Fire X4170 Server

1. Unpack the replacement PCIe card and place it on an antistatic mat.

2. Locate the proper PCIe slot for the card you are replacing.

3. If necessary, review the PCIe card guidelines to plan your installation.

See PCIe Card Configuration Guidelines for additional information.

4. Remove the PCIe riser.

See Servicing PCIe Risers.

5. Insert the PCIe card into the slot PCIe riser (FIGURE 4-14 [1]).

6. Place the PCIe riser into the motherboard and tighten the captive No. 2 Phillips screw securing the riser to the motherboard [2].

7. If necessary, remove the PCI slot filler panel from the back panel crossbar.

FIGURE 4-14 Installing a PCIe Card on Sun Fire X4170 Server

8. Reconnect the cables to the PCIe card that you unplugged during the removal procedure.

9. Return the server to operation.

a. Install the top cover.

See Install Top Cover.

b. Slide the server into the rack.

See Returning the Server to the Normal Rack Position.

c. Connect any data cables required to the PCIe card.

Route data cables through the cable management arm.

d. Reconnect the power cord (or cords) to the power supply (or supplies) and power on the server.

See Powering On the Server.

Verify that the AC Present LED is lit.

4.4.4 Remove PCIe Cards From Sun Fire X4270 and X4275 Servers

Caution - Ensure that all power is removed from the server before removing or installing expansion cards. You must disconnect the power cables before performing this procedure.

1. Prepare the server for service.

a. Power off the server and disconnect the power cord (or cords) from the power supply (or supplies).

See Power Off the Server.

b. Slide the server out of the rack.

See Extending the Server to the Maintenance Position

c. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

d. Remove the top cover.

See Removing the Top Cover.

2. Locate the PCIe card that you want to remove, and note its corresponding riser board.

See Sun Fire X4170, X4270, and X4275 Servers Back Panel Features for more information about PCIe slots and their locations.

3. If necessary, make a note of where the PCIe cards are installed.

4. Unplug all data cables from the PCIe card.

To disconnect the cables from the PCIe card, press the latch, push in toward the connector, and then pull out to remove the cable.

Note the location of all cables for reinstallation later.

5. Remove the PCIe riser (FIGURE 4-12).

See Servicing PCIe Risers.

6. Carefully remove the PCIe card from the riser board connector.

7. Place the PCIe card on an antistatic mat.

8. If you are not replacing the PCIe card, install a PCIe filler panel in the PCI slot in the PCIe riser vacated by the PCIe card.

PCIe filler panels are located in the motherboard back panel.

4.4.5 Install PCIe Cards on Sun Fire X4270 and X4275 Servers

1. Unpack the replacement PCIe card and place it on an antistatic mat.

2. Locate the proper PCIe slot for the card you are replacing.

3. If necessary, review the PCIe card guidelines to plan your installation.

See PCIe Card Configuration Guidelines for additional information.

4. Remove the PCIe riser.

See Servicing PCIe Risers.

5. If necessary, remove the PCI filler panel from the PCIe riser.

6. Insert the PCIe card into the correct slot on the riser board.

7. Replace the riser board.

a. Slide the riser back until it seats in its slot in the back panel.

b. Tighten the captive No. 2 Phillips screw securing the riser to the motherboard.

8. Reconnect the cables to the PCIe card that you unplugged during the removal procedure.

9. Return the server to operation.

a. Install the top cover.

See Install Top Cover.

b. Slide the server into the rack.

See Returning the Server to the Normal Rack Position.

c. Connect any data cables required to the PCIe card.

Route data cables through the cable management arm.

d. Reconnect the power cord (or cords) to the power supply (or supplies) and power on the server.

See Powering On the Server.

Verify that the AC Present LED is lit.

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4.5 Servicing the Battery

The battery maintains system time when the server is powered off and a time server is unavailable. If the server fails to maintain the proper time when powered off and not connected to a network, replace the battery.

Caution - Ensure that all power is removed from the server before removing or installing the battery. You must disconnect the power cables from the system before performing these procedures.

4.5.1 Remove Battery

1. Prepare the server for service.

a. Power off the server and disconnect the power cord (or cords) from the power supply (or supplies).

See Power Off the Server.

b. Slide the server out of the rack.

See Extending the Server to the Maintenance Position.

c. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

d. Remove the top cover.

See Removing the Top Cover.

2. To remove the battery, place you finger between the battery and side wall of the server chassis and push the battery away from the side wall (FIGURE 4-15).

3. Twist the battery (either clockwise or counter-clockwise) and lift it out.

FIGURE 4-15 Removing the Battery

4.5.2 Install Battery

1. Unpackage the replacement battery.

2. Press the new battery into the battery holder with the positive side (+) facing the server chassis side wall.

3. If the service processor is configured to synchronize with a network time server using the Network Time Protocol (NTP), the ILOM clock will be reset as soon as the server is powered on and connected to the network. Otherwise, proceed to the next step.

4. If the service processor is not configured to use NTP, you must reset the ILOM clock using the ILOM CLI or the web interface. For instructions, see the Sun Integrated Lights Out Manager 2.0 User’s Guide (820-1188).

5. Return the server to operation.

a. Install the top cover.

See Install Top Cover.

b. Slide the server into the rack.

See Returning the Server to the Normal Rack Position.

c. Reconnect the power cord (or cords) to the power supply (or supplies) and power on the server.

See Powering On the Server.

Verify that the AC Present LED is lit.

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4.6 Servicing CPUs

The following topics are covered:

• Remove CPU
• Install CPU

Caution - Ensure that all power is removed from the server before removing or installing a CPU. You must disconnect the power cables from the system before performing these procedures.

4.6.1 Remove CPU

1. Prepare the server for service.

a. Power off the server and disconnect the power cord (or cords) from the power supply (or supplies).

See Power Off the Server.

b. Slide the server out of the rack.

See Extending the Server to the Maintenance Position.

c. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

d. Remove the top cover.

See Removing the Top Cover.

2. Remove the CPU (FIGURE 4-16).

a. Identify which CPU to remove.

b. Identify the location of the faulty CPU by pressing the FAULT REMIND button on the motherboard (FIGURE 4-1).

• If CPU LED is off: CPU is operating properly.
• If CPU LED is on (amber): CPU is faulty and should be replaced.

CPU0 is closest to the power supply bay (FIGURE 4-16 [1]).

c. Unscrew the two hex screws from the heatsink for the faulty CPU [2].

Turn the screws alternately one and one half turns until they are fully removed.

d. Twist the heatsink slightly to break the grease seal, lift off the heatsink and place it upside down on a flat surface to prevent the thermal grease from contaminating other components.

e. Use an alcohol pad to clean the thermal grease from both the bottom of the heatsink and the top of the CPU

Be very careful not to get the thermal grease on your fingers.

Caution - Failure to clean the heatsink and the CPU prior to removing the CPU could result in the accidental contamination of the CPU socket or other components. Also, be careful not to get the grease on your fingers as this could result in contamination of components.

f. Disengage the CPU release lever by pushing down and moving it to the side away from the CPU, and then rotating the lever upward [3].

g. Open the pressure frame and carefully remove the CPU [4].

FIGURE 4-16 Removing the CPU

4.6.2 Install CPU

1. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

2. Unpack the replacement CPU.

3. Install the CPU (FIGURE 4-17).

a. Properly orient the CPU with the socket alignment tabs and carefully place the CPU into the socket [1].

Ensure that the orientation is correct as damage might result if the CPU pins are not aligned correctly.

FIGURE 4-17 Installing the CPU

b. Lower the pressure frame.

Ensure that the pressure frame sits flat around the periphery of the CPU.

c. Engage the release lever by rotating it downward and slipping it under the catch [2].

d. Use the syringe (supplied with the new or replacement CPU) to apply approximately 0.1 ml of thermal grease to the center of the top of the CPU. Do not distribute the grease.

e. Inspect the heatsink for dust and lint. Clean if necessary.

f. Orient the heatsink so that the two screws line up with the mounting studs [3].

g. Carefully position the heatsink on the CPU, aligning it with the mounting posts to reduce movement after it makes initial contact with the layer of thermal grease [3].

Caution - If the heatsink assembly is moved too much during its installation, the layer of thermal grease may not be distributed evenly, leading to component damage.

h. Tighten the screws alternately one-half turn until fully seated.

4. Return the server to operation.

a. Install the top cover.

See Install Top Cover.

b. Install the server into the rack.

See Reinstalling the Server in the Rack.

c. Reconnect the power cord (or cords) to the power supply (or supplies) and power on the server.

See Powering On the Server.

Verify that the AC Present LED is lit.

5. Clear server CPU faults.

a. To show server faults, log in to the server as root using the ILOM CLI and type the following command to list all known faults on the system:

-> show /SP/faultmgmt

The server lists all known faults, for example:

  Targets:
      0 (/SYS/MB/P0)
  Properties:
  Commands:
      cd
      show

b. To clear the fault type the following command:

-> set /SYS/MB/P0 clear_fault_action=true

For example:

-> set /SYS/MB/P0 clear_fault_action=true
Are you sure you want to clear /SYS/MB/P0 9y/n)? y
Set ‘clear_fault_action” to ‘true’

---

4.7 Servicing the Motherboard Assembly

You must remove the motherboard assembly to access the following components:

• Power distribution board
• Paddle card

If you are removing the motherboard merely to access the power distribution board or the paddle card, you do not have to remove any of the following components from the motherboard:

• PCIe riser(s) and attached PCIe card(s)
• DDR3 DIMMs
• CPUs
• Compact flash card

Caution - Ensure that all power is removed from the server before removing or installing the motherboard assembly. You must disconnect the power cables from the system before performing these procedures.

Caution - These procedures require that you handle components that are sensitive to electrostatic discharge. This discharge can cause server components to fail. To avoid damage, ensure that you follow the antistatic practices as described in Performing Electrostatic Discharge and Antistatic Prevention Measures.

Caution - This procedure requires removing the server from the rack. The server is heavy. Two people are required to remove it from the rack.

4.7.1 Remove Motherboard Assembly

1. Prepare the server for service.

a. Power off the server and disconnect the power cord (or cords) from the power supply (or supplies).

See Power Off the Server.

b. Remove the server from the rack.

See Removing the Server From the Rack.

c. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

d. Remove the top cover from the server.

See Removing the Top Cover.

2. If the server is an Sun Fire X4270 or X4275 system, remove the plastic air baffle.

See Remove Air Baffle.

3. Disconnect the storage drive data cables from the SAS PCIe card or the motherboard SATA connectors.

Caution - The storage drive data cables are delicate. Ensure they are safely out of the way when servicing the motherboard.

4. If you are removing the motherboard because it has failed and needs to be replaced, remove the following components from the motherboard:

• DDR3 DIMMS. For instructions, see Remove Faulty DIMMs.

• PCIe risers and attached PCIe cards. For instructions, see Remove PCIe Riser From Sun Fire X4170 Server.
• CPUs. For instructions, see Remove CPU.
• Compact flash card

5. Remove the motherboard.

a. Disconnect the power distribution board ribbon cable (see FIGURE 4-18 [1]).

b. Remove the four screws that secure the motherboard to the bus bar (see FIGURE 4-18 [2]).

Use a No. 2 Phillips screwdriver.

c. Loosen the green captive screw on the front of the motherboard that secures the motherboard to the chassis (see FIGURE 4-18 [2]).

d. Using the finger loop just below the four screws that secure the motherboard to the bus bar [2], carefully slide the motherboard to the rear of the chassis [3], lift it out of the chassis, and place it on an antistatic mat.

FIGURE 4-18 Removing the Motherboard Assembly

4.7.2 Install Motherboard Assembly

1. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

2. Install the motherboard.

a. Place the motherboard into the chassis (FIGURE 4-19 [1]).

Position the motherboard carefully.

FIGURE 4-19 Installing the Motherboard Assembly

b. Install the four screws that secure the motherboard to the bus bar (FIGURE 4-19 [2]).

Use a No. 2 Phillips screwdriver.

c. Tighten the green captive screw on the front of the motherboard, that secures the motherboard tray to the chassis (FIGURE 4-19 [2]).

3. If you are replacing the motherboard because it failed and needed to be replaced, you can now reinstall the reusable components.

Reusable motherboard components are as follows:

• DDR3 DIMMS. For instructions, see Install DIMMs.

• PCIe risers and attached PCIe cards. For instructions, see Install PCIe Riser on Sun Fire X4170 Server and Install PCIe Riser on Sun Fire X4270 and X4275 Servers.
• CPUs. For instructions, see Install CPU.
• Compact flash card.

4. Carefully connect the power distribution board ribbon cable to the motherboard (FIGURE 4-19 [3]).

Ensure that it is seated properly.

5. Connect the two storage drive data cables to the storage drive cage.

Caution - The storage drive data cables are delicate. Carefully connect them and ensure that they are seated properly when servicing the motherboard.

6. If the server is a Sun Fire X4270 or Sun Fire X4275 system, install the air baffle.

See Install Air Baffle.

7. Return the server to operation.

a. Install the top cover.

See Install Top Cover.

b. Install the server into the rack.

See Reinstalling the Server in the Rack.

c. Reconnect the power cord (or cords) to the power supply (or supplies) and power on the server.

Verify that the AC Present LED is lit.

See Powering On the Server.

---

4.8 Resetting Passwords and Clearing CMOS NVRAM

Caution - Ensure that all power is removed from the server before removing or installing the motherboard assembly. You must disconnect the power cables from the system before performing these procedures.

Caution - These procedures require that you handle components that are sensitive to electrostatic discharge. This discharge can cause server components to fail. To avoid damage, ensure that you follow the antistatic practices as described in Performing Electrostatic Discharge and Antistatic Prevention Measures.

The following topics are covered:

• Overview
• Reset the BIOS Password and Clear the CMOS NVRAM Using the CLR CMOS Button

4.8.1 Overview

You can clear the CMOS NVRAM and BIOS Password by pressing the CLR CMOS button, which is located on the motherboard. You can also reset the BIOS passwords from the BIOS Setup utility.

4.8.2 Reset the BIOS Password and Clear the CMOS NVRAM Using the CLR CMOS Button

1. Prepare the server for operation.

a. Power off the server and disconnect the power cord (or cords) from the power supply (or supplies).

See Power Off the Server.

b. Remove the server from the rack.

See Removing the Server From the Rack.

c. Attach an antistatic wrist strap.

See Performing Electrostatic Discharge and Antistatic Prevention Measures.

d. Remove the top cover from the server.

See Removing the Top Cover.

2. Press and release the CLR CMOS button (FIGURE 4-20).

FIGURE 4-20 Location of the CLR CMOS Button

3. Install the top cover.

See Install Top Cover.

4. Power on the server and boot until a message appears that indicates that NVRAM has been cleared.

See Powering On the Server.

The BIOS password is reset to the default and the CMOS NVRAM is cleared.

Verify that the AC Present LED is lit.

5. Slide the server into the rack.

See Reinstalling the Server in the Rack.

^{1 (TableFootnote) This DIMM configuration requires CPUs supporting 1333MHz.}

Sun Fire X4170, X4270, and X4275 Servers Service Manual

820-5830-13

Copyright © 2010, Oracle and/or its affiliates. All rights reserved.