LG 50PG6300 Service Manual page 30

14. No Sound – HDMI 1/2/3 Input
- Check the condition of the HDMI cable connection.
- Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
- Check the EDID data of EEPROM(U311,U326,U327)
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Only for training and service purposes
No Sound
Pass
Check the signal
input/output of U281
Pass
Repeat D Process
Pass
Check input source cable or
jack(JP311,JP326,JP327)
Fail
­30­
Re-soldering or Change the
defect part(U281)
LGE Internal Use Only