Clearing Cmos Memory; Power Checkout; Troubleshooting The Ethernet Controller - IBM IntelliStation M Pro Hardware Maintenance Manual

15. Replace the computer cover; then, reconnect all external cables and power
16. Turn on the computer to restart the operating system.

Clearing CMOS memory

If you experience severe problems with the computer and the computer does not
start, the code might be damaged. You might need to clear the CMOS memory to
recover. To clear CMOS memory, complete the following steps:
1. Turn off the computer and all attached devices.
2. Disconnect all power cords from electrical outlets, and remove the computer
3. Remove the battery, wait 60 seconds, and replace the battery. For instructions
4. Replace the cover (see "Replacing the cover" on page 47 or "Replacing the side
5. Turn on the computer to restart the operating system.

Power checkout

Power problems can be difficult to solve. For example, a short circuit can exist
anywhere on any of the power distribution buses. Usually, a short circuit will cause
the power subsystem to shut down because of an overcurrent condition.
A general procedure for troubleshooting power problems is as follows:
1. Turn off the computer, and disconnect all ac power cords.
2. Check for loose cables in the power subsystem. Also check for short circuits, for
3. Remove adapters and disconnect the cables and power connectors to all
4. Reconnect all ac power cords, and turn on the computer. If the computer starts
To use this method, you must know the minimum configuration required for the
computer to start (see page 115).

Troubleshooting the Ethernet controller

This section provides troubleshooting information for problems that might occur with
the 1 Gbps Ethernet controller.
Information is also available on the Ethernet controller documentation on the Device
Drivers and IBM Enhanced Diagnostics CD for information about problems that
might occur with the 1 Gbps Ethernet controller.
The way the Ethernet controller is tested depends on which operating system you
are using (see the Ethernet controller device-driver file).
cords and turn on the peripheral devices.
cover (see "Removing the cover" on page 34 or "Removing the side cover" on
page 52).
for removing and replacing the battery, see "Replacing the battery" on page 29.
cover" on page 67), and reconnect all cables that were disconnected.
example, if there is a loose screw causing a short circuit on a circuit board.
internal and external devices until the computer is at the minimum configuration
required to start the computer (see page 115).
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
FRUs of minimal configuration one at a time until the problem is isolated.
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Diagnostics