Troubleshooting
2–5
Table 2–2
Blank Screen, No Video, but Raster is Present
Symptom
Possible Cause
Suggested Solution
Raster can be
displayed by
adjusting the
brightness control,
but no video or
cursor can be seen
even when the
contrast control is
at maximum.
The Host system
CRT screen saver
feature is activated.
Press any key to reactivate the
display.
Internal cabling is
loose or faulty.
Check all the cables to the
deflection module and the
video casting assembly.
The host system
is not supplying
video signals to the
monitor.
Connect the monitor to a
known working host system (if
available) to verify the problem
before replacing any monitor
modules.
Host system is
faulty.
Repair the host system.
Video casting
assembly is faulty.
Replace the video casting
assembly (Section 3.2.5).
Deflection module is
faulty.
Replace the deflection module
(Section 3.2.4).
Faulty CRT/chassis
assembly
Replace the CRT/chassis
assembly (Section 3.2.6)
only after trying the previous
solutions.
