HP Omni Pro 110 Maintenance and Service Guide: HP Omni Pro 110 All-in-One PC - Page 86

Resetting the CMOS Jumper - factory reset

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Resetting the CMOS Jumper 1. Turn off the computer and any external devices, and disconnect the power cord from the power outlet. The power must be disconnected from the system to clear CMOS. 2. Disconnect all external equipment connected to the computer. WARNING! To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet, and allow the internal system components to cool before touching. CAUTION: Static electricity can damage the electronic components of the computer or optional equipment. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. See the Hardware Reference Guide for more information. 3. Disassemble the computer until you can gain access to the system board. CAUTION: Resetting CMOS will restore the computer to factory defaults and will erase any customized information including passwords, asset numbers, and special settings. 4. Locate the header and jumper labeled CMOS+PW. NOTE: Be sure you have disconnected the AC power cord from the wall outlet. The CMOS will not clear if the power cord is connected. NOTE: For assistance locating the CMOS jumper and other system board components, see the Illustrated Parts & Service Map (IPSM). You can download the IPSM from http://www.hp.com/ support. 5. Put the jumper on pins 2 and 4. This clears CMOS. 6. Put the jumper back on the original pins. 7. Replace the access panel. 78 Appendix A POST Error Messages

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Resetting the CMOS Jumper
1.
Turn off the computer and any external devices, and disconnect the power cord from the power
outlet. The power must be disconnected from the system to clear CMOS.
2.
Disconnect all external equipment connected to the computer.
WARNING!
To reduce the risk of personal injury from electrical shock and/or hot surfaces, be
sure to disconnect the power cord from the wall outlet, and allow the internal system components
to cool before touching.
CAUTION:
Static electricity can damage the electronic components of the computer or optional
equipment. Before beginning these procedures, ensure that you are discharged of static electricity
by briefly touching a grounded metal object. See the
Hardware Reference Guide
for more
information.
3.
Disassemble the computer until you can gain access to the system board.
CAUTION:
Resetting CMOS will restore the computer to factory defaults and will erase any
customized information including passwords, asset numbers, and special settings.
4.
Locate the header and jumper labeled
CMOS+PW
.
NOTE:
Be sure you have disconnected the AC power cord from the wall outlet. The CMOS will
not clear if the power cord is connected.
NOTE:
For assistance locating the CMOS jumper and other system board components, see the
Illustrated Parts & Service Map
(IPSM). You can download the IPSM from
support
.
5.
Put the jumper on pins 2 and 4. This clears CMOS.
6.
Put the jumper back on the original pins.
7.
Replace the access panel.
78
Appendix A
POST Error Messages