LG 50PG6300 Service Manual page 20

4. No Display – PC Input
- Check the condition of the PC 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(R,G,B)
input/output of U351
Pass
Check the signal(H/Vsync)
input/output of U376
Pass
Check the signal input/output of U81
Pass
Check input source cable or jack(JP376)
Fail
Fail
Fail
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Re-soldering or Change the
defect part(U351)
Re-soldering or Change the
defect part(U376)
Re-soldering or Change the
defect part(U81)
LGE Internal Use Only