I have a Samsung UN65HU8550 4K TV with a problem..the screen has gone bright white.Images can be seen in the background and audio is fine..I was told to switch out T Con board and main board..

SOURCE: Bright white screen with faint images

If lighting did strike, you would be suffering power supply problems, due to a power surge from the strike.
The problem sounds like it could be related to the LCD panel becoming faulty or if your able to test inside the unit with a multimeter, you can measure the voltages from the printed circuit boards, especisly those suppling power to the LCD panel as well as the Logic PCB, A small printed circuit board you will find either attatched to the LCD panel. I hope this helps.
Good luck.

SOURCE: sharp Lc-26sb24u white screen with sound

You will get a white screen when you unplug the t-con from the main board. Doing so removes power to the LCD panel. Verify that all of your voltages from the power supply are correct. If they are, I'd look at the t-con board. It sounds like there is a problem with the t-con that is pulling down the main board.

Its Me Charlie

• 14 Answers
• Posted on Jan 20, 2015

SOURCE: Polaroid 3211-TLXB solarized / negative image

Just replace the T-Con board and you dont need any soldering at all. JUst be careful for the flex connector.

Testimonial: "Will do. Thank you, Jorge!"

SOURCE: How to fix an intermittent white screen on a Samsung television?

Ask them to replace the t-con board. It could be a defect one.Good Luck.

Serge.

Electro Med Services

• 6694 Answers
• Posted on Feb 15, 2016

SOURCE: Condition is white screen with faint moving images, sound works. Is this just a bad T-con? Have tried unplugging TV for 2 hr, tried adjusting brightness settings, no help.

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. Also check for T CON board Articles

http://electro-medical.blogspot.com/