Acer AT4220A Service Manual page 72

AV1/S-Video No Sound
AV1/S-Video/R-L
Cable plug in?
Mute turn-off
Volume =30
Earphone remove
AV1/S-Video Source
can Display?
AV1/S-Video Sound
65
1
Normal?
Check Video and R-L
cable or Replacement
Video or R-L Cable
Check Video and R-L
cable or Replacement
Video or R-L Cable
Replacement IO/B
AV1/S-Video Sound
Normal?
END
L1
Chapter 3