Vizio d55u-d1 sound works, no picture, no backlight, and restarts

[gilbo125]

Greetings!

My Vizio D55u-d1 recently went dark. Was watching TV via HDMI from a nvidia shield. The screen went dark all of a sudden. Basically, where I am left now is testing it via coaxial with the source of an OTA antenna. When I have that hooked up, the sound works, however, there is no picture, no backlight, and the TV restarts every few minutes. Here is a picture of the back of the TV and the back of the main board. My thoughts are the main board. Can anyone help? Thanks in advance.

[CapLeaker]

Re: Vizio d55u-d1 sound works, no picture, no backlight, and restarts

Unfortunately this TV has 4 failure points.
- the LED strings
- the PSU that feeds the LED regulator board,
- the LED regulator board
- and the Main board signal to turn the backlights on.

Now we need high resolution pictures of these 4 boards front and back.

[gilbo125]

Re: Vizio d55u-d1 sound works, no picture, no backlight, and restarts

Replaced the main board and it's working again. Thanks.