IBM IntelliStation Z Pro 6223, Hardware Maintenance Manual And Troubleshooting Manual, Page: 30 / 180

CMOS
data
(JCMOS1)
3 2 1 3 2 1
Default
(pins 1 and 2) Default
(pins 1 and 2)
Clear CMOS data
(pins 2 and 3)
(JCON1)
BIOS crisis
recovery
(no jumper)
6. Remove the boot block recovery jumper from pins 1 and 2.
7. Replace any adapters that were removed; then, replace the support bracket
and replace the cover.
8. Connect the computer to a power source, keyboard, monitor, and mouse.
9. Insert the POST/BIOS update (flash) recovery diskette or CD into the diskette
drive or CD-ROM drive.
10. Turn on the computer and the monitor.
11. After the update session is completed, turn off the computer and monitor.
12. Remove the diskette or CD from the diskette drive or CD-ROM drive.
13. Disconnect all power cords; then, remove the computer cover.
14. Return the boot block recovery jumper to pins 1 and 2.
15. Replace the computer cover; then, reconnect all external cables and power
cords and turn on the peripheral devices.
16. Turn on the computer to restart the operating system.
Erasing a lost or forgotten password (clearing CMOS)
This section applies to lost or forgotten passwords. More information about lost or
forgotten passwords is available in Access IBM.
Complete the following steps to set the CMOS recovery jumper and erase a
forgotten password:
1. Review the safety information beginning on page 125 and “Handling
static-sensitive devices” on page 23.
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IntelliStation Z Pro Types 6223 and 6227: Hardware Maintenance Manual and Troubleshooting Guide