Re: Samsung UE75MU7009TXZG Endless Power Cycle

Thanks for the support! For me the frustrating aspect is that I do not understand the internal workings of the TV enough, and that I do know if I'm even looking in the right place. Any compontent on any of these three big boards could be broken, plus of course anything on those tiny boards hidden under the bezel.

And the only place I can put the TV down on is the couch - which mean that is blocked while I am trying to fix.

My repair skills are probably neither the best nor the worst. I can solder to a decent...

Re: Samsung UE75MU7009TXZG Endless Power Cycle

Thanks indeed it is easier to remove the cover on top of them. Cannot really spot anything wrong with them either though. Thermal only shows heat around the cables that go to the display.

Honestly I'm close to giving up

Re: Samsung UE75MU7009TXZG Endless Power Cycle

Oh I see! Sorry indeed I misunderstood, I thought you were talking about one of the big 20 cm X 20 cm (ish) boards. Ok I'll see if I can pry those tiny boards out from their hiding holes and check them!

Re: Samsung UE75MU7009TXZG Endless Power Cycle

That seems to be hundreds of components. I removed the heatspreader and inspected the whole board with the IR camera. The main CPU thingy and a couple of other smaller ICs light up (to around 30-40 degrees C), everything else remains at ambient temperature.

Re: Samsung UE75MU7009TXZG Endless Power Cycle

Thanks for the suggestion. I disconnected the four flat cables:



The image on the left shows the state of the board when all four cables are CONNECTED (three LEDs light up).

The image on the right shows the state of the baord when NONE of the cables are connected. In this case only one of the LEDs lights up.

In both cases the TV goes through an endless loop of power-cycles.

What else can I try?

Samsung UE75MU7009TXZG Endless Power Cycle

Hi everyone and thanks in advance for any help I might get here

My Samsung TV is about 4 years old. The exact model number is UE75MU7009TXZG.
About half a year ago I started seeing occasional green frames pop up while watching movies. I mean literally green frames. Not the image turning green, but the entire screen turning green for a split second. This happened maybe once or twice during a 2 hour movie. So no big deal, but clearly something was not quite right.

Since a few days, the TV won't turn...

Re: New Members - please post your introductions here

Hi everyone,

I have a broken TV and I hope to get some help in fixing it here