TCL 40" LED issues

[joeshannallie]

I recently picked up a TCL(never heard of it) brand 40" LED TV and all it will do is the power light will come on when plugged up. My question is if the video board is bad should I be able to take that board out and the screen still light up? The inverter is built into the power board. It only has 3 boards. Power board and video board and remote board. Please someone reply and let me know if you know.

[budm]

Re: TCL 40" LED issues

You can check the DCV at the PS-ON, bl-on pinS of the power supply to see if it has >2.5VDC, if it does then the balclights should come on.
How about uploading good clear pictures of the boards, and also give the model numer.
TCL is sold at Costco and Walmart at low price and I do not expect them to be around years from now..

[joeshannallie]

Re: TCL 40" LED issues

Thanks Bud, I was hoping you would reply. I have attach the pics. The power board is the actual one and I did not keep the video board out. The pic is exact as mine. When I press the power button the red light goes off. I have to unplug it and plug it back in for the red light to come back on. There is a keen or sharp humming noise coming from the large canister capacitor. Not loud but enough to hear it. First LED set I have had. How do I know if the screen is bad?

[budm]

Re: TCL 40" LED issues

https://www.badcaps.net/forum/attach...9&d=1470019357
So what DCV do you have on those pins of the connector when TV is turned on?
What DCV do you have between the two legs of the main filter cap when TV is turned on?

[joeshannallie]

Re: TCL 40" LED issues

I tried to check them and seems they were out of range. My meter was showing 012 to 014 on most. Probably did it wrong. I will try again this evening and take my time. It has been awhile for me on these tvs. But when I press the power button the standby light disappears and there is no voltage on the pins until I unplug it from the power and plug it back up. I checked the voltage on the cap and it trickles down to zero. I probably done it wrong. I will try again maybe this evening. Thanks for the reply.

[budm]

Re: TCL 40" LED issues

Meter set to DCV? 20Vdc scale?

[Louis82]

Re: TCL 40" LED issues

Hello there,

I have a TCL Tv that the initial problem was that it would play fine for 10 to 15 seconds and it would cut off. So I replaced the main board and tv played great but when I was closing the tv I noticed a distorted picture. I wiggle the LVDS cable that connects main board to interface board (not sure if I would call it T-Con) and picture looked good. I taped the LVDS cable thinking it was loose but nothing, problem still come and goes when I wiggle cable.
I decided to reversed the cable (it works with samsung tvs) and tv now shows like if its stuck in a test pattern. It shows green, blue, red color (see pictures).
I couldn't understand why so I put it back to like it was originally and now it doesnt show anything at all, just the backlight appears to be on and sound.

Any suggestions? I added a few pictures.

[budm]

Re: TCL 40" LED issues

You may want to remove the cable and real close at those exposed conductors at the both ends of the cable to make sure there is no damages and all the cable are seated properly.