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4. Troubleshooting
4-9. No Sound
Symptom
The LED power turns on but the screen is blank when the DVI cable is connected.
-
Even though the LED power turns on, the screen is blank when connecting the DVI cable.
-
Check the DVI cable connections.
Major
-
checkpoints
Check whether the LVDS cable is connected correctly to the panel.
-
Check whether the lamp connector of the panel is connected correctly to the IP board.
-
Diagnostics
Caution
Make sure to disconnect the power before working on the IP board.
4-22
Picture is display, no sound.
Yes
⑥ Does the signal appear at Pin
#71,72,73,74,76,77,78,79 of IC5002?
Yes
Check the 3.3V of #25 IC2005.
Yes
⑦ check output signal of
#36,37,31,30,54,53,48,47 of IC2005
Yes
Replace the speaker ass'y?
IC2005
IC5002
Main Board Front
No
No
No
No
Connect a sound cable.
control a volume.
Check a connection harness.
check IC2003.
Change a main PBA.
check IC2005.
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