Sun Enterprise 3500 System Reference Manual

Chapter 10 Flow Diagrams for Troubleshooting

This chapter lists solutions to these problems:

No AC or DC Power

Table 10-1 AC/DC Power Problems

Indication 

Test/Procedure 

Reference 

No AC 

Fans are not turning 

No LEDs 

Check incoming AC power.  

 

 

Check keyswitch setting.  

See "Restarting the System".

Check AC distribution unit switch 

 

See Figure 11-2.

No DC or yellow LED is lighted 

 

Check system front panel LEDs or clock+ board LEDs. 

 

See Table 9-1.

 

Check PCMs. 

 

See Table 9-2, Table 9-3.

 

Check peripheral power supply.  

 

 

 

Check CPU/Memory+ boards.  

 

 

 

If clock+ board is faulty, system operation/diagnostics may be erratic. 

 

 

System error messages 

 

Check LEDs on: --Front panel --Clock+ board --Peripheral power supply --PCMs --CPU/Memory+ boards --I/O+ boards  

See Chapter 9, Troubleshooting Overview.

System Cannot Boot

Table 10-2 Operating System Problems

Indication 

Test/Procedure 

Reference 

System cannot boot  

or cannot load UNIX 

Check LEDs on front panel or clock+ board. 

 

See Table 9-1 for LED codes.

 

Are CPU/Memory+ board LEDs cycling? 

 

See Table 9-2 for LED codes.

 

 

Is boot disk running? 

 

 

  Are the Interface Board cables properly connected?See Table 8-1.

 

Is OpenBoot set to boot automatically?  

 

 

 

In OpenBoot, check system status: 

-- Connect a terminal to serial port A on the clock+ board 

-- Reset the system 

-- Type v s

-- Select system configuration: option 0 

-- Select: option 2 

-- Replace indicated components 

 

 

System boots with errors or runs with intermittent problems 

Check message files. 

 

Refer to SunVTS User's Guide.

Run SunVTS to test suspected boards, CPUs, SIMMs, power supplies, other devices. 

 

 

 

Start prtdiag log file to collect error messages.

 

See "prtdiag Command".

 

"Lost carrier" or "no carrier."  

See "Failure of Network Communications".

Defective CPU/Memory+ Board

CPU/Memory+ boards are hot-pluggable.

Table 10-3 CPU/Memory+ Board Problems

Indication 

Test/Procedure 

Reference 

System error message or LED code identifies a specific board 

Locate indicated board.  

LED code must be Off-On-Off. See Table 9-2.

Check LEDs on board to verify ASR has deactivated the board. 

 

See "Hot-Plug Feature".

 

Replace the board or device. (Note: board is not active until system is booted.) 

 

 

Board not identified or intermittent problem 

Check /var/adm/messages .

 

 

Run SunVTS to test suspected boards, CPUs, SIMMs, power supplies, other devices. 

 

Refer to SunVTS User's Guide.

 

Check related PCM. 

See "Defective Power Supplies".

Defective I/O+ Board or Interface Board

Interface boards are hot-pluggable in many instances.

Table 10-4 I/O Interface

Indication 

Test/Procedure 

Reference 

System error message or LED code identifies a specific board 

Locate indicated board.  

LED code must be Off-On-Off. See Table 9-2.

Check LEDs on board to verify ASR has deactivated the board. 

 

See "Hot-Plug Feature".

 

Replace the board or device. (Note: board is not active until system is booted.) 

 

 

  GBIC missing or in wrong slot.See Table 8-1.

Board not identified or intermittent problem 

Check system message files. 

 

 

Start prtdiag log file, if necessary, to record error messages.  

 

See "prtdiag Command".

 

Run SunVTS to test suspected boards, CPUs, SIMMs, power supplies, other devices. 

 

Refer to SunVTS User's Guide. 

 

Check I/O cable connections. 

 

 

 

Ensure JTAG Test Jumper on PCI cards is disabled/removed. 

 

See "Replacing or Installing a PCI Card".

 

Check related PCM.  

See Table 10-6.

Defective Disk Drive

Table 10-5 Disk Drive Problems

Indication 

Test/Procedure 

Reference 

System error message or device code identifies a specific fault 

Check system messages to locate failed drive.  

 

 

Halt access to device and power down the device or tray.  

 

Internal drives: Chapter 7. Tray: tray service manual.  

 

Set ID code (if used) on replacement device before installing.  

 

See Table C-2, or refer to drive or array documentation for ID code.

 

If replaced unit is SPARCstorage Array disk tray or the tray controller board, reset world-wide name (WWN).  

 

Refer to SPARCstorage Array documentation.  

Device not identified or intermittent problem 

Run SunVTS. 

 

Refer to SunVTS User's Guide.

For SCSI device, use OpenBoot probe-scsi-all.

 

 

 

Check cable connection. 

 

 

 

If replaced unit is SPARCstorage Array disk tray or the tray controller board, reset world-wide name (WWN). 

 

Defective Power Supplies

The auxiliary peripheral power supply and power/cooling modules (PCMs) are hot-pluggable.


Caution - Caution -

Boards in slots adjacent to a PCM may overheat if the supply is removed and not replaced. The PCM provides cooling air to two board slots.



Caution - Caution -

Do not hot-plug boards or modules if the peripheral power supply/AC is defective. The hot-plug feature requires a working PPS/AC for precharge current.


Table 10-6 Power Supply Problems

Indication 

Test/Procedure 

Reference 

For Peripheral power supply: System error message Peripheral device fails

Verify module is ready: --Green LED off. --Yellow LED may be on. 

 

See Chapter 7, Power Supplies.

 

Before replacing any other hot-pluggable devices, replace faulty peripheral power supply to ensure availability of precharge current.  

 

 

For PCM: System error message Board fails

Verify PCM is ready: --Green LED off. --Yellow LED may be on.  

See "Power/Cooling Module (PCM)".

Defective Clock+ Board

There is one clock+ board in the system.


Caution - Caution -

The clock+ board is not hot-pluggable. You must halt the operating system and turn off AC power before replacing the clock+ board.


Table 10-7 Clock+ Board

Indication 

Test/Procedure 

Reference 

System will not boot  

 

Examine LED displays. 

See Table 9-1.

Clock+ board yellow "service" LED does not light during POST or remains lighted after POST 

 

Check clock+ board.  

 

System and board LEDs do not flash, or fail POST repeatedly with random LED patterns 

 

Check clock+ board and power supplies. 

See Table 10-6.

TTY port A does not respond  

Check settings for the port. 

Replace peripheral power supply. 

See "Using a Terminal".

Network Does Not Respond

Table 10-8 Network Problems

Indication 

Test/Procedure 

Reference 

Network does not respond 

Use the OpenBoot command watch-net-all to display network conditions.

 

See "Failure of Network Communications".

 

(For 10BASE-T only) Is Ethernet Link Integrity Test set incorrectly?  

 

See "Failure of Network Communications".

 

Are the TPE and MII ports in use at the same time on the same board?  

See "Failure of Network Communications".