Onn 100012588 backlight issue *Solved 70 inch

[EazyBone]

Had another one of these 70 inchers from onn and was same problem as others. The picture shows but no backlight. The backlights test fine. The issue is the 450v 10uf capacitor by the backlight connector. Usually the cap bulges, the cap I replaced today for fix was NOT bulging. Replaced anyway and fixed.

Hope this helps someone.

[dcapper]

Is this a common thing? My Onn same model number is acting up. It turns on and sometimes it flashes the Onn picture and turns off. I tried hard resets and nothing helped.

[nomoresonys]

If not able to test caps, just switch those 2 out, be sure the polarity is correct, that's one pretty simple way to either fix it or eliminate them from being the issue.

[EazyBone]

To me it's common. Ive had 6 of these and it was always that capacitor in the picture. There's only 1 capacitor also.

The cap should be slightly bulged, but I have also seen flat ones, and replaced it anyways and that's what worked

2023 version of this TV, which is same model number, has a cord that is not removable, I've had an issue with main board, but the TV appeared to be dead, so different problem.

I would be safe to say that yes this is your problem.

[nomoresonys]

Right only one on this tv, some tvs have 2, one for each side.

[dcapper]

Awesome guys! I wanted the tv up and running fast so I just bought some caps off Amazon. If it acts up again I'll put in Nichicons, Rubicons, or Panasonics.