Samsung MO15E Series Service Manual page 29

CONFIDENTIAL
4 Troubleshooting
4-3 No OSD
There is video but no OSD.
Press exit key for more than 5
seconds to do the factory preset.
While pushing a front control Do the pulses appear at Pin2
No
No
button, does any pulse appear and Pin3 of CN600 while
pushing a front control button?
at Pin 16, 17 of IC501?
Yes
Yes
Replace IC300 and
Replace IC501 or check its
check its related circuit.
related circuit.
Replace the key function PBA.
4-4 MO15E*