Servicing The Computer - Compaq Armada 4200 Reference Manual

7. Replace the retaining ring by aligning the notches. Then use
the trackball tool to turn the retaining ring clockwise until it
snaps into place.
8. Replace the battery pack and reconnect the AC Adapter if
necessary.

Servicing the Computer

To get help from Compaq Customer Support or to find a Compaq
authorized reseller or service provider location, call
one of the numbers in the worldwide telephone numbers list in
Appendix A, "Compaq Customer Support."
Your Compaq authorized reseller or service provider is available
to answer your questions, install optional equipment, and service
your computer.
If you take the computer in for service, remember to provide the
power-on password or, if possible, disable the password in
Passwords Properties prior to delivery to the service provider.
Troubleshooting 15-23