26LD310 (CHASSIS:LP92A) - LG TV Service Manual (repair manual). Page 32

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TROUBLE SHOOTING GUIDE
No Raster On AV Signal
No Signal On TV(RF) Signal
Ch
k I
t
Pass
Check Input source 
Pass
Check Input source 
Cable And Jack
Cable And Jack
Pass
Pass
Check The Input/Output
Re-soldering or
Check The Input/Output
Of JK101
Re-soldering or 
Change the defect part
Fail
Check The Input/Output
Of TU401
Pass
Re soldering or 
Change the defect part
Fail
Pass
Check the Input/Output
Of IC604
Fail
Re-soldering or 
Change the defect part
Check the Input/Output
Of Q401,IC707
Fail
Re-soldering or 
Change the defect part
Pass
Pass
Repeat [A], & [B] Process
Pass
Check the Input/Output
Of IC703,IC706
Fail
Re-soldering or 
Change the defect part
Check the Input/Output
Of L402,L403
Fail
Re-soldering or 
Change the defect part
Pass
Repeat [A], & [B] Process
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