Undetermined Problem - IBM PS/2 95 XP 486 Hardware Maintenance Service

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4.0 Undetermined Problem

You are here because the diagnostic tests did not identify which adapter

or device failed.

Do not isolate FRUs that are known to be good.

If the power-on light is not on, verify (with power off) that the

voltage-select switch is in the correct position.

supply voltages.

If the voltages are not correct, replace the power

supply.

If the voltages and switch setting are correct, do the following:

Power-off the system.

Remove or disconnect one of the following:

Note:

Minimum operating requirements are one pair of 1MB kits (type 1

systems) or one 2MB kit (type 2 systems), the processor board,

and the default drive 6.

Non-IBM devices

Modem, printer, mouse, or other device

Any adapter (except the Processor Board)

Processor board cache option (256KB)

487SX math coprocessor option

Hard-disk or diskette drive

Memory-module kits.

Power-on the system.

If the problem remains, repeat steps 1 through 3 until you find the

failing adapter or device.

If all adapters and devices have been removed and the problem remains,

suspect the system board, processor board, then the power supply.

IBM PS/2 Model 95 XP 486 HMS

Undetermined Problem

Then check the power

4.0 - 1

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