Troubleshooting - LG 19LH20R Service Manual

No power
(LED indicator off)
Check 24V, 12V, 5,2V
of Power B/D
Pass
Check Output of
IC1001, IC1003, IC1007
Pass
Check LED Assy
Pass
Check P307 Connector
No Raster
Pass
Check LED status
On Display Unit
Pass
Check Panel Link Cable
Or Module
Pass
Check Inverter Connector
Or Inverter
Pass
Check Output of IC802
Pass
Check LVDS Cable
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Only for training and service purposes

TROUBLESHOOTING

[A] PROCESS
:
Fail
Check short of Main B/D
or Change Power B/D
Fail
Check short of IC1001,
Change IC1002,, Q1003
Fail
[B]: Process
Fail
Change Panel Link Cable
Fail
Change Inverter Connector
Fail
Fail
Fail
Fail
IC1003, IC1007
Pass
Change LED Assy
Repeat A PROCESS
Or Module
Or Inverter
Change IC802
Change Module
- 16 -
Re-soldering or Change defect
part of IC1001, IC1003, IC1007
LGE Internal Use Only