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No audio output
No audio output
Check if XP2 conect
ok or not from the AV
board to mainboard
Check whether the audio signal
is right from the U915'9,10,11,12
Yes
Check whether the audio
signal is right from the
U6'1,7
Yes
Check If the C511,C501
is on
Go
Yes
4-2
No
Fix XP2 in AV board
No
Check the U915 power supply
Replace the U915
NO
Check the U6 power supply
(U6'4=-12V and U6'8=12V)
Replace the U6
NO
Add the two set
Trouble shooting chart
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