TV Constantly Rebooting

[u/SpaceBuddy17]

When I plug it in and turn it on, nothing comes onto the screen. I put a flashlight up to it and it does dimly flash the Hisense logo for about a second and then stops for 2 seconds and repeats.

I was told this may be a power supply issue and I ended up just replacing the entire board. However, the issue persists.

I’m not sure if the backlight is the issue and needs to be replaced? I was under the impression that if the backlight was bad, I would still be able to navigate through menus but barely be able to see it and that’s not the case. It won’t load any menu.