Power Checkout - IBM IntelliStation M Pro 6225 Hardware Maintenance Manual And Troubleshooting Manual

5. Locate the IEEE 1394 (FIreWire) enable/disable jumper on the system board.
6. Move the IEEE 1394 (FireWire) enable/disable jumper from pins 1 and 2 to pins
7. Replace any adapters that were removed; then, replace the side cover.
8. Connect the computer to a power source, keyboard, monitor, and mouse.
9. Turn on the computer.

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.
Note: To help isolate whether a power problem is in the power distribution bus or in
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
Remove any adapters that impede access to the jumper. The following
illustration shows the location of the jumper on the system board.
Boot Block Jumper (J1)
Boot Block
Default (Recover)
(pins 1 and 2) (No Jumper)
3 2 1 3 2 1
2 and 3 to set it to disabled. The default is enabled.
the power supply, check the power supply error LED on the rear of the
computer. If this amber LED is lit, replace the power supply.
example, if there is a loose screw causing a short circuit on a circuit board.
IEEE 1394 ( Firewire )
enable / disable jumper Clear CMOS Jumper (JBAT1)
Default Disable
3 2 1 3 2 1
Default Recover
3 2 1 3 2 1
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Chapter 3. Diagnostics