Thank you for being a valued part of the CNET community. As of December 1, 2020, the forums are in read-only format. In early 2021, CNET Forums will no longer be available. We are grateful for the participation and advice you have provided to one another over the years.

Thanks,

CNET Support

Question

Samsung smart tv flashes at bottom of screen during 3D

Apr 13, 2017 10:13AM PDT

I have a Samsung UA40F6400 smart tv which has developed a bright flash approx 2 per second at the bottom of the screen only in 3D mode. is this a psu failure?

Discussion is locked

- Collapse -
Answer
To me this sounds defective.
Apr 13, 2017 10:14AM PDT

Time to call it in. Be sure they check if the firmware is current.

- Collapse -
To me this sounds defective.
Apr 14, 2017 6:21AM PDT

Probably, thanks.

I have noticed that when i turn the backlighting down to 3 out of 20 the problem goes away. I may just watch 3d videos this way, as its very seldom that I use the 3D option of this set.

- Collapse -
Yes, defective.
Apr 14, 2017 7:38AM PDT

Always call these in as you want them to help you check firmware, do resets and re-test. Sometimes there's a bulletin on issues that no one will know until you call in.

- Collapse -
Solved (hopefully)
Apr 18, 2017 12:01AM PDT

Had a chat with the Samsung techie. He says he has seen the problem before on this model series.
The set uses more current in 3D mode, and the psu is unable to deliver the required power. Something is breaking down on the psu board. I am going to order a replacement board and pop it in and see what happens.

- Collapse -
Back light flicker only in 3D mode Solved
May 30, 2017 10:27PM PDT

The tv draws more current from its power supply in 3D mode. The power supply was breaking down in 3D mode resulting in backlight flicker/flash. Ordered a new power supply (around $35) popped it in and problem is resolved.

The PSU on this set model number is BN44-00622-C