UN65NU8000FXZA screen glitches then completely shuts off

[spoothead656]

Hello! This started a couple of days ago. I first noticed it while playing a game on my PS5, but the only thing that happened was the screen kind of shuddered up and down. I thought maybe it was the game so I tuned the PS5 off and on again and the issue stopped. The next day I noticed it did the same thing while using my Chromecast and additionally there was a faint white line near the top of the screen that ran the width of the screen. Yesterday (Monday) when I got home from work, the shuddering got worse. It was more rapid and there were some other weird glitches on the screen. Then it completely powered down and turned itself back on. After about 10 seconds of a normal picture it would go through that cycle again. The only thing I could do to stop it was to unplug the TV.

What is going on with this TV? Is this something I can fix, or is it just totally dead?

[JBTechfanatic]

It could be the one connect box or cable. What I would do first go in to setting and do a full manufacturer reset the password is 0000. Then unplug everything cables and one connect box. While unplugged hold the power button on the bottom down for 10 seconds. Then leave every thing unplugged for a full 10 minutes. Now plug everything in and reset the tv up. If this doesn't work you can purchase one connect box and cables online. If you don't have a one connect box still try the reset and unplug ect. Otherwise need service or replacement.

[spoothead656]

Thanks for the reply. The TV does not stay powered on long enough for me to actually get to any settings screen so I don't think I'll be able to do a factory reset. I also do not have a one connect box.

[IRStaten]

Is the TV overheating ?

[spoothead656]

I don't think so. Nothing has changed with its positioning recently. It's mounted on the wall and has plenty of airflow.

[IRStaten]

Is the tv new ? Have you tried to contact Samsung care regarding this issue ? It could be a failing power supply, a damaged MB due to unknown conditions. A ribbon cable became loose and when the TV is on for long periods of time the heat will make it react. Have you tried to update the TV firmware ?

[spoothead656]

It's definitely not new. I bought it at the end of 2018 so the warranty is expired. The TV will not stay powered on long enough for me to update the firmware. It stays on for about 10-15 seconds before it completely powers off.

[IRStaten]

Hmm.. 15-20 seconds hard to tell what's going on..

[OoYORIoO · Accepted solution]

@spoothead656

Thank you for using the Samsung Member's Community and thank you for your question regarding your Samsung Television. I'd like to be of assistance to you with your question. I'll suggest a few potential solutions for you to try.

Samsung Product Support Website:

"How to Discharge or Cold Boot Your Samsung Television"

https://www.samsung.com/us/support/answer/ANS00062957/

1. Unplug the TV from the power source.
2. ***Wait for at least 60 seconds to discharge any residual power.***
3. Plug the TV back into the power source.
4. Disconnect all Devices & Cables from your Samsung Television IE: USB, HDMI, Digital Optical Output, Mouse, & Keyboard
5. Attempt to turn on the TV using the remote or the physical power button.
6. If your Samsung Television is plugged into a Power Strip or Surge Protector. (Test and ensure that the Power Strip or Surge Protector is Functioning Properly)

If these steps don't resolve the issue with your Samsung Television. I will provide additional information on how to seek Support for your Samsung Television here:

Please contact Samsung Customer Care: 1-800-SAMSUNG

You can find support at Samsung's Website here:

https://www.samsung.com/us/support/contact/

Or if you prefer you can also send a private message with your full model and Serial Number and the Information to a Samsung Moderator. @Samsung_Moderator

Thank you for using the Samsung Member's Community and thank you for your question regarding your Samsung Television. Samsung Customer Support is here to assist you. Thank you!

[OoYORIoO]

@spoothead656

Here is a generalized idea of what's happening with your Samsung Television.

It's unlikely that the issue you're experiencing with your Samsung Television can be resolved by performing the procedural troubleshooting steps. Usually there are a number of them. However, it sounds unlikely that they will resolve your issue.

As far as the issue you are experiencing from what symptoms you do mention. It sounds like there's a problem with the power board side of your Television. That's not to say that it's just the power supply board or just one issue. The issue you are experiencing is the internal system that protects the Television from further damage.

It very well could be that there are LED Strips that have gone bad. The internal Power Supply Expects an expected uptake voltage to the LED's. The LED's are supposed to consume that expected power. When it senses that the LED's aren't consuming the power they should be. It will cause the Television to shut off.

I hope that I have given you an idea as to where to look. I don't work for Samsung nor can my advice be taken as being for Samsung Corporation or any of it's Affiliates. Depending on the age of the Television and how much you want to pay? You could have it repaired or fix it yourself. My personal opinion.