HP 16500 Installation And Service Manual page 22

Touch Test System, then select Mainframe Test in the pop-up menu.
6
The screen will display the Mainframe Test menu.
Select Option Board Test, then select Run.
7
If an HP 16501A expansion frame is not connected, then expect a "No
Expansion Card Present" message to appear when you run the Option Board
Test. Refer to the HP 16500B/16501A Service Guide for more information
about the expansion frame.
Servicing the Interface Module
Verify the Interface Module Performance
3-5