Repairing an Out-of-Warranty Big Screen TV Yourself for $100 or less

Posted on Dec 03, 2018

I bought a 65 inch Vizio UHD 4K big screen TV from Walmart for $800+ that stopped booting up to picture and sound right after the 12 month warranty expired.

After a little research I discover new big screen TVs are basically just computers with a really big monitor. Take the back off and what you see is 4 or 5 computer looking PC boards screwed to a piece of sheet metal with wires and ribbons connecting them. The screen is on the other side.

With a little more research I discover most brands of big screen TVs use the cheapest parts possible to get those super competitive low prices that keep dropping every year.

I discovered Vizio uses low bid contracts for their main motherboards that controls everything your TV does. It’s quite common for a whole lot of manufactured TVs to have low quality main motherboards that burn out after a year or more. Like light bulbs. I’ve read many online threads where a lot of people are writing about burned out TVs in just months after they were purchased.

So I’m $800+ into a dead TV with nothing to lose to open it up and see if I can fix it myself before I pay a TV guy to come look at it or take it into a shop.

I was surprised and pleased to learn you can buy all 4 TV computer boards to rebuild a TV for less than $100 for most brands. Mine was $124. But the new board is probably better quality than what came with the TV.

Plus there are hundreds of YouTube videos for just about any brand of TV DIY repair.

I get the 4 board rebuild kit in the mail, well wrapped. In 10 minutes I had the main motherboard replaced and plugged back in. I stood it up, plugged the cables back in and it booted right up like brand new. So I have a new power board and all the other boards as backup parts. Or I can sell them myself online.

Here’s the deal, if a big screen TV boots to the Logo and then the screen goes black after a few minutes, 9 times out of 10 that’s a classic sign that the main motherboard burned out.

So if you see someone trying to unload a $2,000 big screen TV because it “stopped working”, you might want to take it and repair it for $100 and keep it or sell it. I understand there are recycling centers that end up with hundreds of these TVs. Find one that boots to the Logo, then goes blank and you can probably fix that TV for $100.

If you can operate a screw driver and follow directions on a video you can do this. Unplug it first. That’s the biggest key point. Disconnect the TV from power and cable.

Skip to about one minute in this video and see how fast you can replace a defective main motherboard.


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