Philips BDP2500 Service Manual page 13

No audio output
No audio output
Check whether the audio signal
is right from the U915.9,10,11,12
Check whether the audio
signal is right from the
U916.7 and U916.1
Yes
Replace the U916
Go
Yes
5-2
No
Check the U915 power supply
Yes
Replace the U915
No Check
(U916.4=-12V and U916.8=12V)
Trouble shooting chart
the U916 power supply
Replace the U916