Riddled TV Repair Forum

Dodgexander · Joined: 04 Feb 2016 Posts: 1 Location: UK

I own a LE40M86BD which in the US is internally comparable to the 65f series and externally to the 61f.

It's been turning itself off, then on, then off, then on for a while but it's now been getting a lot worse. It starts to happen about 5-10 minutes after its switched on. This on/off cycle happens now for as much as an hour and then stops on its own. After the TV has stopped turning itself off then on it works completely fine!

I've read online similar cases and unfortunately they all lead to the same blown capacitor problem. See my pictures in the album but there are no signs of bad caps, the only thing i can see is discoloration on the back of the main board. I just can't see anything in particular wrong.

What could the problem be? When the screen turns off the TV clicks. You see the TV turn off just the same as If you unplugged the cord then power is restored and it comes back on for a few seconds, the picture is shown fine and then once again turns off.

I could guess and replace the whole power board for a decent cost but i see the TV selling for very little so I'm not sure it's worth it. The main board i can't even find an exact replacement and I'm scared if not exactly the same it won't work with the panel.

Photo album : https://goo.gl/photos/sAt5NG6tQ9wNpJum7

Thanks for any help.

Dodge

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kuhurdler · Joined: 28 Dec 2006 Posts: 2879 Location: Overland Park, KS

I'd check the voltage levels of that power supply when it's working normally, and again if possible when it is cycling on/off.