When Playing Disc ,No Audio Output; No Optical / Digital Output - LG RH4820W Service Manual

5. When playing DISC ,no audio output

IC702 - 46: HIGH ?
( LOW: AUDIO MUTE )
YES
IC201 – 14,15,18,19
Check audio output
YES
IC201 - 1 : HIGH ?
RESET_Audio status)
YES
IC201 – 8,9 :
I2C signal normal?
YES
Check IC201 power and
other circuits

6. No OPTICAL / DIGITAL output

PN6701 - 2 signal normal?
YES
Check FFC CABLE signal
flow
NO
Check IC702 power and
other circuits
NO
Check IC201 power and
other circuits
NO
Check IC309 power and
other circuits
NO
Check
R120,R121,R122,R123
NO
Check R112
3-5