HP PAVILION DX6500 - Manual (Page 41)

Unknown user password
If the computer you are servicing has an unknown user password, follow these steps to clear the password.
NOTE: These steps also clear CMOS.
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 from the computer by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the computer.
4 . Remove the battery (see Battery on page 36 ).
5 . Remove the RTC battery (see RTC battery on page 45 ).
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.
Preliminary replacement requirements 33