Samsung SyncMaster 570BTFT Service Manual page 18

4-6 No Sound
Does the DC 5 V appear at Pin
4 of IC803, Pin 5 of CN806?
Yes
Does the sound input signal
appear at Pins 6 and 11 of IC803?
Yes
Do the sound signals appear at
Pins 3 and 14 of IC803?
Yes
Does the DC 2.5 V bias appear at
Pin 16 of IC503?
Yes
Check CN814, CN815 outputs.
SyncMaster 570BTFT/580BTFT
No
Check IC803, IC804, VR841 and
related circuit.
No
Check Pins 1 and 2 of CN806 and
related circuits.
No
Check IC803 and related circuits.
No
Check C815, CN813, R821, R822,
ZD803 on the Audio PCB.
4 Troubleshooting
4-5