IBM 8862 User Manual - Page 69

2. Note that the MEM LED on the light path diagnostics panel is lit; one of the DIMMs in the memory cassette is defective. 3. Open the cover and locate the lit LED beside the defective DIMM. Note: The lit LEDs light the connector retaining clips; look for a lit retaining clip to identify a failed DIMM. 4. Follow the instructions in "Installing memory modules" on page 9 to remove and replace the DIMM. Light path diagnostics panel The following illustration shows the LEDs on the Level 2 Light Path Diagnostics panel, which is on the side of the operator information panel. PS1 TEMP VRM PCI DASD NMI EXP OVER SPEC PS2 FAN CPU MEM NR SP LOG REMIND For more information about the Light Path Diagnostics feature, see the Hardware Maintenance Manual and Troubleshooting Guide. The following table describes the LEDs on the Light Path Diagnostics panel. Light Path Diagnostics panel LED PS1 PS2 TEMP FAN VRM CPU PCI MEM DASD NR NMI SP EXP LOG OVER SPEC REMIND button Description Power supply number 1 failure Power supply number 2 failure System over temperature condition Hot-swap fan or power-supply fan failure VRM failure Microprocessor failure PCI failure Memory failure Hard disk drive failure Nonredundant power mode Nonmaskable interrupt Remote Supervisor Adapter II failure Attached expansion I/O failure See event log or Remote Supervisor Adapter II log for non-optimal condition information Power supplies being overdriven Press to invoke remind mode Notes: 1. The server requires replaceable voltage regulator modules (VRMs) with microprocessors 3 and 4. 2. The server supports a maximum of two power supplies. Chapter 6. Solving problems 57