Light path diagnostics LEDs
The following table describes the LEDs on the light path diagnostics panel and suggested actions to correct the detected problems.
vFollow the suggested actions in the order in which they are listed in the Action column until the problem is solved.
vSee the Problem Determination and Service Guide on the IBM System x Documentation CD to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).
vIf an action step is preceded by “(Trained service technician only),” that step must be performed only by a trained service technician.
Lit light path |
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diagnostics LED with |
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the |
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information LED also |
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lit | Description | Action |
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All LEDs are off (the |
| No action is necessary. | ||
power LED is lit; the |
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information LED might |
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be lit). |
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POWER SUPPLY 1 | Power supply 1 has failed or has | 1. | Reinstall the power supply 1. | |
| been removed. | |||
| 2. | Check the individual | ||
| Note: In a redundant power | |||
| 3. | Reseat the following components: | ||
| configuration, the dc power LED on | |||
| one power supply might be off. |
| a. | Power supply |
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| b. (Trained service technician only) Power | |
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| backplane |
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| 4. | Replace the components listed in step 3, one at a | |
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| time, in the order shown, restarting the server each | |
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| time. | |
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| 5. | If a 240 V ac fault has occurred, remove ac power | |
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| before restoring dc power. | |
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POWER SUPPLY 2 | Power supply 2 has failed or has | 1. | Reinstall the power supply 2. | |
| been removed. | |||
| 2. | Check the individual | ||
| Note: In a redundant power | |||
| 3. | Reseat the following components: | ||
| configuration, the dc power LED on | |||
| one power supply might be off. |
| a. | Power supply |
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| b. (Trained service technician only) Power | |
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| backplane |
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| 4. | Replace the components listed in step 3, one at a | |
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| time, in the order shown, restarting the server each | |
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| time. | |
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| 5. | If a 240 V ac fault has occurred, remove ac power | |
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| before restoring dc power. | |
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CONFIG | Microprocessor configuration error. | 1. | Mismatched microprocessors, remove and install | |
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| two microprocessor of the same cache size, type, | |
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| and clock speed. | |
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| 2. | Check the system error log for information | |
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| indicating incompatible components. | |
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