Samsung UN50NU7400 - No Picture (but boot screen and screensaver)

[arbitarytwist]

Have a Samsung UN50NU7400 which shows a boot screen and a screen saver if left on long enough but no picture ?

Would a moving screen saver confirm that the panel is ok or it could still be a panel issue ?

[EazyBone]

I have had this before where no image would show up and was blank, also had a QLED boot screen. After 10-20 minutes a Samsung logo would bounce around the screen.

Replaced main board and TV worked fine. Wasn't panel issue.

Haven't seen the issue again. With my one TV experience with this, I'd say it's main board

[arbitarytwist]

I have had this before where no image would show up and was blank, also had a QLED boot screen. After 10-20 minutes a Samsung logo would bounce around the screen.

Replaced main board and TV worked fine. Wasn't panel issue.

Haven't seen the issue again. With my one TV experience with this, I'd say it's main board

How do i go about troubleshooting the mainboard.

[EazyBone]

No clue I'm not advanced enough to do that

its not the panel it's not the lights it's not the PSU... So..