April 2004
9-36 Servicing the PT878GC
Testing the Screen
To test the proper functioning of the PT878GC screen, scroll to
the Test Screen option in the Test Menu and press [ENTER]. The
screen then shows the message, “Press Any Key To Continue.”
Once you press a key, a screen with a checkerboard pattern
appears, as shown in Figure 9-21 below.
Figure 9-21: A Functioning Test Screen
Pressing a key two more times should result in two more
checkerboard patterns, followed by a series of dark and light
screens. Pressing the key through this sequence should return the
PT878GC to Operate Mode. If the test does not proceed
according to this sequence, please consult GE Panametrics.