Compaq CPQ-C1786FNSL Service Manual page 23

6-2 OSD Abnormal
is 5V and pin 5, 10, 7, 8
Troubleshooting
OSD Abnormal
Check I502 pin 9, 4
missing?
No
Check R517, L514,
R527, R523, R524
OK?
Yes
Check P502
OK?
Yes
Replace I502
CPQ-C1786FNSL/T (FS7550/V7550)
Put on
Yes
I502
Replace them
No
Replace it
No