HP 750 - Manual (Page 171)

Troubleshooting C4705-90000 8-53
32. Button Test
The purpose of this test is to verify the operation of the frontĆpanel buttons.
Perform the button test as follows:
1 In the Service Tests submenu, scroll to 32 Button Test" and press Enter.
SERVICE TESTS
32 Button test
2 The Press any key to start test" message is displayed on the frontĆpanel.
3 Press a button on the frontĆpanel. A message stating which button was pressed will be
displayed on the frontĆpanel.
Example: If the Cancel button is pressed, the message
Cancel Pressed / Exit: Up & Down"
will be displayed on the frontĆpanel.
Press the Up and Down Arrow buttons simultaneously to stop the test.
If a button is pressed but is not shown on the front-panel display or is incorrect, then the test has
failed.
If the test fails, try
replacing one of the following components:
1 FrontĆpanel assembly ' page 6Ć18.
2 Main PCA ' page 6Ć9.
Only replace one component at a time and perform the “Button” test again before replacing
another component. Using this procedure you will be able to determine exactly which component
failed.