Service manual

4 Troubleshooting
4-4 SyncMaster 150T
Does the input signal appear
at the Pin2, 5 and 10 of IC401?
Check IC401 and related circuit.
Yes
No
While pushing a front control
button does any pulse appear
at Pin12 of IC401?
Check IC401 and related circuit.
No
4-4 No OSD
There is video but no OSD.
Replace IC401.
Yes
Yes
31
30
32