"Compaq.com - Compaq Presario Series Maintenance and Service Guide - Models: 1246, 1277, 1278, and 1279
Cover with Touch Pad.
5. Remove the
heatspreader.
6. Remove the keyboard.
7. Remove RTC battery for
30 seconds and replace it.
8. Reassemble the
computer.
9. Turn on the computer to
verify that the power-on
password has been
cleared. If it has not been
cleared, repeat Steps 1
through 9.
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