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42SL90QR-MA (CHASSIS:LP91L) - LG TV Service Manual (repair manual). Page 32

Read LG 42SL90QR-MA (CHASSIS:LP91L) Service Manual online

No Raster On AV (Video, S-Video)Signal
No Signal On TV(RF) Signal
Check Input source 
Cable And Jack
Pass
Check Input source 
Cable And Jack
Pass
Check The Input/Output
Of JK101, JK201
Pass
Re-soldering or 
Change the defect part
Pass
Fail
Pass
Repeat [A], & [B] Process
Check the Input/Output
Of IC800
Fail
Re-soldering or 
Change the defect part
Pass
Check The Input/Output
Of TU500
Pass
Re-soldering or 
Change the defect part
Pass
Fail
Check the Input/Output
Of IC800
Fail
Re-soldering or 
Change the defect part
Repeat [A], & [B] Process
SL90 Series
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