HP 4000 Maintenance & Service Guide HP Compaq 4000 Pro Small Form Factor B - Page 170

E-1, Illustrated Parts & Service Map IPSM.

Page 170 highlights

4. Locate, press, and hold the CMOS button in for five seconds. NOTE: Make sure you have disconnected the AC power cord from the wall outlet. The CMOS button will not clear CMOS if the power cord is connected. Figure E-1 CMOS button NOTE: For assistance locating the CMOS button and other system board components, see the Illustrated Parts & Service Map (IPSM). 5. Replace the computer cover or access panel. 6. Reconnect the external devices. 7. Plug in the computer and turn on power. NOTE: You will receive POST error messages after clearing CMOS and rebooting advising you that configuration changes have occurred. Use Computer Setup to reset any special system setups along with the date and time. 160 Appendix E Password Security and Resetting CMOS

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4.
Locate, press, and hold the CMOS button in for five seconds.
NOTE:
Make sure you have disconnected the AC power cord from the wall outlet. The CMOS
button will not clear CMOS if the power cord is connected.
Figure E-1
CMOS button
NOTE:
For assistance locating the CMOS button and other system board components, see the
Illustrated Parts & Service Map (IPSM).
5.
Replace the computer cover or access panel.
6.
Reconnect the external devices.
7.
Plug in the computer and turn on power.
NOTE:
You will receive POST error messages after clearing CMOS and rebooting advising
you that configuration changes have occurred. Use Computer Setup to reset any special system
setups along with the date and time.
160
Appendix E
Password Security and Resetting CMOS