Ich weiss, dass mit dem Batterie herausnehmen hast schon gemacht, aber hast es so gemacht wie auf der
http://web14.compaq.com/falco/detail.asp?FAQnum=FAQ1039
beschrieben?
Compaq FAQ: Clearing Power On Password (FAQ1039)
Question: How do I clear the Power On Password if it is not known?
Answer:
Clearing Passwords
The power-on password prevents use of the computer until the password is entered. The setup password prevents unauthorized changes to Computer Setup. To clear the passwords, you must remove all power from the system board. If you do not know the passwords, use the following procedure to clear the password:
1. Remove all battery packs from the battery bay and MultiBay, if applicable.
2. Disconnect the AC power.
3. Remove the real-time clock battery.
4. Wait five minutes.
5. Reconnect the AC power.
6. Restart the computer. During Power-On Self Test (POST), a "162 System Options not set" message appears.
7. Shut down the computer, then disconnect AC power again.
8. Replace the real-time clock battery.
9. Install the battery pack(s).
HTH