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 G-1 CMOS button
NOTE: For assistance locating the CMOS button and other system board components, see the
Illustrated Parts & Service Map (IPSM) for that particular system.
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.
Clearing and Resetting the CMOS 149
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