RCA RLED-4275a backlight flash once

[donnyb]

I have a RCA RLED-4275a, the back-light comes on once when the tv is turned on, for a split second. then turns off.

I have used this forum to replace capacitors on a few Computer Monitors before with good success.

I have replaced the capacitors which were visibly damaged and I am still getting the same error.

I am getting sound when plugged into a tv source, and when using a flashlight I can see the image is working fine as well.

I have a few pictures of the boards:


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[donnyb]

Re: RCA RLED-4275a backlight flash once

UPDATE:

Still no real progress, when I unplug the wire that runs from the top right of the bottom picture to the only side-mounted port on the first picture, the back-light flashes on and off when it's first re-plugged in, does this indicate an issue with the controller board?

Any input is appreciated.

[RinusB]

Re: RCA RLED-4275a backlight flash once

I know this is an old post but others will find this.
The backlights flash on and off due to a fault in the leds in the backlights.
The protection circuit acts immediately to prevent further/any damage.
When this happens the picture and sound generally still work. The picture can often be seen by using a flashlight close to the screen. Check YouTube how this can be done. Good luck.