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15LS1R-MG (CHASSIS:CL-81) - LG TV Service Manual (repair manual). Page 17

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- 17 -
No Raster
Check LED Status 
on display unit
Check the input/
Output of U301
Check 
U401~U405, U407, U409
Check inverter
Connector or inverter
Check input source cable and jack 
Repeat [A] PROCESS
Fail
Change U401~U405,
U407, U409
Fail
Change U301
Fail
Change inverter
connector or inverter
Fail
Change panel link
cable or module
Fail
Check panel link 
Cable or module
Pass
Pass
Pass
Pass
Pass
:[B]Process
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