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The following illustration and table show the blade locations and functions of the DIMM Fault LED, the Charge Status LED, and the Fault Remind button.
Use the following DIMM test circuit items to diagnose DIMM faults:
Note - If the green Charge Status LED fails to light when you press the Fault Remind button, it is likely that the capacitor powering the fault remind circuit has lost its charge. This can happen if the Fault Remind button is pressed for a long time with fault LEDs lit or if power has been removed from the server for more than 15 minutes.
Caution - Do not press the white Clear CMOS Button (SW1801).
To identify faulty DIMMs:
Caution - This procedure requires 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 electrostatic discharge safety measures and antistatic practices. See Performing ESD and Antistatic Prevention Measures.
A lit green Charge Status LED, located next to the Fault Remind button, indicates that the Fault Remind LED circuit is operational.
Note - The Charge Status LED indicates the test circuit power level. If the Charge Status LED is out, the Fault Remind LEDs can not function. After the blade is inserted into the Sun Netra chassis, the test circuit will recharge. However, any DIMM errors must reoccur to be stored and visible on a DIMM Fault LED during the next fault remind test.
Release the button after an amber DIMM Fault LED lights. Do not hold the Fault Remind button down longer than necessary.
For information about using the DIMM test circuit, see Using the DIMM and Processor Test Circuit .
Note - The DIMM Fault LED remains on when the Fault Remind button is pressed after the DIMM is re-seated. The blade must be powered up again to verify if re-seating fixes the DIMM problem.
See Remove DIMMs.