Samsung TXT3093WHX Service Manual page 74

6-3-2 NO Signal
1. When the Power Board is normal
Replace the Regulator Board.
Replace the Regulator Board.
Yes
Check the RF Block
of the System Board.
Samsung Electronics
Check RF, DTV,
and the Video screen.
Check the Tuner Voltage.
Check if the Tuner is 5V.
Check the Tuner SDA,
and SCL
Check the CVBS output.
No
Replace the Tuner.
Check the signal picture.
No
Check the Video Block.
Check the DTV Block
Troubleshooting
6-5