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.
1
.
Shut down the computer. If you are unsure whether the computer is off, 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 29
).
5
.
Remove the real-time clock (RTC) battery (see
System board and system board frame
on page 52
).
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.
26 Chapter
4
Removal and replacement procedures
Summary of Contents for Compaq 6720t
Page 1: ...HP Compaq 6720t Mobile Thin Client Maintenance and Service Guide ...
Page 4: ...iv Safety warning notice ...
Page 8: ...viii ...
Page 114: ......
