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2. Remove the battery pack and AC Adapter.
3. Remove the backup battery (RTC) for 20
minutes or use a screwdriver to touch the
backup battery (RTC) for 1 second.
4. Put back the backup battery (RTC).
5. Power on the computer and wait until POST
ends.
6. Verify that the password prompt does not
appear.
Supervisor and HDD passwords:
The Supervisor password and Hard Disk password
(Hard Disk1 and Hard Disk2) are security features
that are used to protect the system and the hard disk
drive data from unauthorized access. No overriding
capability is provided, so it cannot be replaced if they
are forgotten. If the customer forgets the Supervisor
password, the system board must be replaced. If the
customer forgets the Hard Disk password, the hard
disk drive must be replaced.
ThinkPad 390E
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