Read LG 42LK410 (CHASSIS:LP91U) Service Manual online
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TROUBLESHOOTING
No power
(LED indicator off)
Check 24V, 12V, 3.5V
of Power B/D
Check short of Main B/D
or Change Power B/D
Pass
Check Output of
IC1001, IC1002, IC1003,
IC1005, IC1007
Check P403 Connector
Change LED Assembly
:
[A] PROCESS(for non-adapter models)
Fail
Fail
Pass
Pass
Check LED Assembly
Change IC1002, IC1008, Q1003
Pass
Check short of
IC1001, IC1002, IC1003,
IC1005, IC1007
Fail
Re-soldering or Change defect part
Fail
No Raster
[B]: Process
Check LED status
On Display Unit
Repeat [A]/[A-1] Process
Pass
Fail
Check PANEL_VCC
of LVDS wafer
Check Output of Q1003
Fail
Change Inverter Connector
Or Inverter
Fail
Pass
Fail
Pass
Change LVDS cable
Fail
Check LVDS Cable
Pass
Check Panel Link Cable
Or Module
Change Panel Link Cable
Or Module
Check Inverter Connector
Or Inverter
Pass
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