Unknown User Password - HP 510 Maintenance And Service Manual

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Unknown user password

If the computer you are servicing has an unknown user password, follow these steps to clear the
password.
NOTE
Before disassembling the computer, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power cord.
4. Remove the battery (see
5. Remove the real-time clock (RTC) battery (see
6. Wait approximately 5 minutes.
7. Replace the RTC battery and reassemble the computer.
8. Connect AC power to the computer. Do not reinsert any batteries at this time.
9. Turn on the computer.
All passwords and all CMOS settings have been cleared.
ENWW
These steps also clear CMOS.
Battery on page 29).
RTC battery on page 51).
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