LG DV6812E4 Service Manual page 16

B. Audio abnormal
AUDIO ABNORMAL
Check Audio jack.
YES (If OK)
Check MPEG_CLK Signal
of MPEG part.
YES (If OK)
Refer to Audio part.
YES (If OK)
Refer to MPEG part.
YES (If OK)
Replace B/D.
D. Open/Close abnormal
Check the connection of MD.
YES
OPEN/CLOSE ABNORMAL
Check Front.
Check the
connection of P5901.
NO
Check IC301 Pins 3, 4.
YES
Refer to SERVO part.
C. Video abnormal
VIDEO ABNORMAL
Check Video jack.
Refer to Video part.
Refer to MPEG part.
Replace B/D.
YES (If OK)
NO
YES
3-4
YES (If OK)
YES (If OK)
YES (If OK)
Reconnect it.