IBM 867431X Hardware Maintenance Manual - Page 22
Diagnostics panel
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4. Remove the server/workstation cover (see "Removing the cover" on page 48). Note: Refer to "Working inside a server/workstation with power on" on page 46 for instructions and precautions for working in the server/workstation with the power on. 5. Press and hold the Light Path Diagnostics (blue) button on the diagnostics panel. The LEDs will illuminate while the switch is pressed. Note: You can illuminate the LEDs for a maximum of two minutes. After that time, the circuit that powers the LEDs is exhausted. Diagnostics panel The following illustration shows the LEDs on the diagnostics panel on the system board. See Table 3 for information on identifying problems using these LEDs. Light Path PS MEM TEMP CPU FAN VRM SP PCI Table 3. Light Path Diagnostics LED Description PS Power supply error MEM Memory error occurred TEMP System temperature exceeded maximum rating CPU Microprocessor error FAN Fan failed or operating slowly VRM SP™ Voltage regulator module error Error occurred on service processor PCI Error occurred on an adapter in PCI slot 1 or 2, or one of the PCI service devices integrated on the system board. See "Information panel system error LED" on page 121 for appropriate action. 14 Hardware Maintenance Manual: xSeries 330 Type 8674, IntelliStation R Pro Type 6851, and Network Equipment Building System Type 8674