Samsung PS42E7SX - No Video

Troubleshooting
6-6 Samsung Electronics
6-2-5 No Video
Symptom - A normal/cable network analog broadcast screen is blank or abnormal.
Major Checklist
- Check the antenna connection settings (Antenna 1 - Normal/Cable/DTV, Antenna 2 - Only for DTV)
- Check the tuner output signal (CVBS).
- Check the power input of the Main board.
Troubleshooting
Procedures
Check CN101 pin2 for +33V
Configure properly
Replace the Main SMPS
Replace the Main Board
Is the antenna connection setting
properly configured?