IBM IntelliStation M Pro 6225, Hardware Maintenance Manual And Troubleshooting Manual

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Recovering from a POST/BIOS update failure
Note: You can download a file to create the POST/BIOS recovery diskette or CD
from http://www.ibm.com/pc/support/. For more information, see Appendix A,
“Getting help and technical assistance,” on page 113.
If power to your computer is interrupted while POST/BIOS code is being updated
(flash update), your computer might not restart (reboot) correctly. If this happens,
complete the following steps to recover:
1. Review Appendix B, “Safety information,” on page 115 and “Handling
static-sensitive devices” on page 29
2. Turn off the computer and all attached devices. See “Turning off the computer”
on page 6 for instructions.
3. Disconnect the power cord.
4. Remove the cover.
5. Locate the boot block recovery jumper (J1) on the system board. Remove any
adapters that impede access to the jumper. The following illustration shows the
location of the boot block jumper on the system board.
Boot Block Jumper (J1)
Boot Block
(Recover)
(No Jumper)
Default
(pins 1 and 2)
3 2 1 3 2 1
Clear CMOS Jumper (JBAT1)
Recover Default
3 2 1 3 2 1
IEEE 1394 ( Firewire )
enable / disable jumper
Disable Default
3 2 1 3 2 1
6. Remove the boot block recovery jumper from pins 1 and 2.
7. Replace any adapters that were removed; then, replace the cover.
8. Connect the computer to a power source, keyboard, monitor, and mouse.
9. Insert the POST/BIOS recovery (flash) diskette or CD into the diskette drive or
CD-ROM drive.
Chapter 3. Diagnostics
23