LG 50PG6300 Service Manual page 19

3. No Display – Component Input
- Check the condition of the Component cable connection.
- Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
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Only for training and service purposes
Repeat A, B Process
Pass
Check the signal(Y,Pb,Pr)
input/output of U351
Pass
Check the signal input/output of U81
Pass
Check input source cable or jack(JP351)
Fail
Re-soldering or Change the defect
Fail
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part(U351)
Re-soldering or Change the
defect part(U81)
LGE Internal Use Only