Advertisement
No audio output
No audio output
Check if CN7\CN8 conection
is ok or not pin to pin from the
AV board to mainboard
Yes
Check whether the audio signal is right
from the U15:'9pin and 10pin
(When you play 1KHz signal disk,the
output is about 2V sine wave)
Yes
Check If the R310,R311 are exsit
Yes
4-2
No
Fix
CN7/CN8
board to mainboard
No
Check the U15 on power supply
(U15:11pin and 14pin=3.3V)
No
Add the two Resistances
Trouble shooting chart
from
AV
No
Replace the U15
Advertisement
