IBM IntelliStation M Pro 6218, Problem Determination And Service Manual

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3. Remove adapters and disconnect the cables and power connectors to all
internal and external devices until the computer is at the minimum configuration
required to start the computer (see “Solving undetermined problems”).
4. Reconnect all ac power cords and turn on the computer. If the computer starts
successfully, replace adapters and devices one at a time until the problem is
isolated.
If the computer does not start from the minimal configuration, replace the
components in the minimal configuration one at a time until the problem is isolated.
Solving Ethernet controller problems
See the Ethernet controller documentation on the Device Drivers CD for information
about problems that might occur with the Ethernet controller.
Solving undetermined problems
If the diagnostic tests did not diagnose the failure or if the computer is inoperative,
use the information in this section.
If you suspect that a software problem is causing failures (continuous or
intermittent), see “Software problems” on page 36.
Damaged data in CMOS memory or damaged BIOS code can cause undetermined
problems. To reset the CMOS data, use the clear CMOS jumper to override the
power-on password and clear the CMOS memory; see “Erasing a lost or forgotten
password (clearing CMOS)” on page 62. If you suspect that the BIOS code is
damaged, see “Recovering from a BIOS update failure” on page 55.
Check the LEDs on the power supply. If the LEDs indicate that the power supply is
working correctly, complete the following steps:
1. Turn off the computer.
2. Make sure that the computer is cabled correctly.
3. Remove or disconnect the following devices (one at a time) until you find the
failure (turn on the computer and reconfigure each time):
v
Any external devices
v
Surge suppressor device (on the computer)
v
Modem, printer, mouse, or non-IBM devices
v
Each adapter
v
Hard disk drives
v
Memory modules. The minimum configuration requirement is 1 GB (two 512
MB DIMMs).
The following minimum configuration is required for the computer to start:
v
Power supply
v
System board
v
Microprocessor
v
Memory (with a minimum of two 512 MB DIMMs)
4. Turn on the computer. If the problem remains, suspect the following components
in the following order:
v
Power supply
v
System board
Chapter 2. Diagnostics
63