Samsung CS21A530FLKXSV Service Manual page 22

Troubleshooting
3. No Picture
- when the power is normall
No picture (1st power OK)
Yes
Check the +125V line
Check the others B+ line
No
Yes Yes Yes
T444 B+ Pin #3
"D811"
Check D407
CHECK CRT ASS`Y
open and check Open and check
No
No
No
Yes
Change the "D811" Check the "Q401"
No
Change D407
Change the "Q401"
Complete
MAIN TRANS FBT D407 OUTPUT
TR Q401
Samsung Electronics 4-9