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15LS1R-MG (CHASSIS:CL-81) - LG TV Service Manual (repair manual). Page 16

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- 16 -
TROUBLESHOOTING
No power 
(LED indicator off)
Check short of main B/D 
or Change Lips
Change U406
Change LED Assy
Check 15V or 5V 
of Lips
Check Output of 
U406
Check LED Assy
Check J103, J125, J126
Connector 
Fail
Fail
Change Q402
Check Output of 
Q402
Fail
Pass
Fail
Pass
Pass
Pass
:[A]Process
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