Isolating undetermined problems

Use the steps in this topic to start isolate undetermined problems with an engine.

Context

Use the information in this section if the diagnostic tests did not identify the failure, the device list is incorrect, or the system is inoperative.
Note: Damaged data in CMOS or BIOS can cause undetermined problems.

Steps

  1. Verify that the power supply LEDs indicate that the power supplies are working correctly.
  2. Power OFF the engine.
  3. Make sure the engine is cabled correctly.
  4. Remove or disconnect the following devices (one at a time) until you find the failure (turn on the server and reconfigure each time):
    1. Any external devices
    2. Surge suppressor device (on the server)
    3. Modem, printer, mouse, or non-IBM devices
    4. Each adapter
    5. Drives
    6. Memory modules
    Note: Minimum operating requirements for the engine are:
    1. One power supply
    2. Power cage assembly
    3. System board
    4. One microprocessor and VRM
    5. Memory module (with a minimum of two 128 MB DIMMs)
  5. If the problem remains, suspect the following FRUs in the order listed:
    1. Power supply
    2. Power cage assembly
    3. System planar and shuttle assembly

Result

If the problem goes away when you remove an adapter from the system and replacing that adapter does not correct the problem, suspect the system planar and shuttle assembly.

If you suspect a networking problem and all the system tests pass, suspect a network cabling problem external to the system.

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