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Miscellaneous Problem Troubleshooting Table
SYMPTOM
.
Marquee lamp is intermittent
or non-functional
.
VGM starts and plays
normally
.
VGM operates normally
.
Cabinet becomes warm after
several hours of use
.
Error messages appear on
screen
CAUSE
1.
Faulty
fluorescent
tube
2. Check continuity of both fluorescent tube
3.
Faulty lamp fixture
1.
2.
Faulty,
wiring
1.
Obstructed fan
2.
3. Turn off VGM power. Remove dust from vent
Faulty wiring
Faulty fan
1.
Faulty hardware
2. Call your authorized distributor for help with
7-14
REQUIRED ACTION
Remove fluorescent tube from its sockets. If you
find cracks or darkened ends, install new lamp.
Clean tube.
filaments.
Verify that fluorescent tube operates by placing it
in working VGM.
Verify that lamp pins make good connection with
socket contacts.
Check
ballast
for
continuity.
Measure fluorescent lamp AC voltages. Check
wiring and connector continuity from AC power
chassis
to
lamp
assembly.
Check bottom and rear of cabinet for blocked
airflow.
Move VGM away from sources of heat.
holes with high-power vacuum cleaner.
Check fan wiring and connectors.
Check operation of all fans, including power
supply
fan.
Check any assembly (RAM, ROM, Battery, etc.)
identified
in
error
messages.
unresolved screen messages.
1 4
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