Hi I have a Sharp Aquos LC-80LE857U that turns on and sometimes displays the Sharp logo then the image flickers and it restarts and other times it will go so far as to show the image and then it flickers and shuts off. Do any off you know what may be the issue with it such as main power supply or main board or something else?

As long as you can isolate and confirm that it is in the TV (and not a quirky streaming device or receiver) flipping on and off, I would point to the power supply first. I don't work on the internals of our gear professionally, but I have brought back many a TV from the grave with an easy power supply swap. Shop Jimmy is a good spot and there are a few others too...

Yes is the TV itself and not an input. I changed the TV and the new TV is working great. I want to fix and use this TV somewhere else. I was thinking it might be the power supply but I just wanted to make sure it is not the main board or another board or chip or component. Thanks for the website I will definitely check it out.

Shop Jimmy says Power supply is out of stock if anyone knows anymore reliable sites let me know the part number for the power supply is RUNTKB120WJQZ.

Sounds more I’d like the main board to me, but just a guess. I’ve had two of these Sharps myself go out because of power supply and neither one even got to the Startup screen.

This one can get to the startup screen where it shows the Sharp logo then flickers and not make it to the video and other times it makes it to the video input and displays video while flickering. I will have to take and upload a video for you guys to look at. Someone else told me it could be bad LED strips but I am still not sure.

If it were a bad LED strip, then it wouldn't cause the TV to reboot. So that likely is not the problem.

I just wanted to take a moment to point out, this is not repairing. Despite what most 'so-called' repair shops do these days, swapping boards until you get a product working again is not repairing. Any high school kid can do board swaps.

To actually repair a product would start with getting a schematic. Then testing circuits on the board, finding problems, and tracing it back to the source of the issue. This is especially useful when you may have a problem on another board, that is damaging a 2nd board. You swap one board, get it working for a little while and then that board gets damaged - because you never troubleshooted why the board failed to begin with.

This among many other reasons is why the fight for "Right-to-repair" is so important. It affects everyone's life whether directly or indirectly.

What board do you think is bad then the power supply or the main board?
Do you "repair" them?

There is no way you or anyone else is going to know that, until you take it apart and work on it.
Looking the boards over, it might be something obvious. Like a blown cap, charred IC, etc. If you don't have any schematics to go by and/or experience with repairing electronics; then you can just try doing the board swap thing.
I would start with taking it apart, pulling the 2 suspected boards and looking them over very carefully. See if anything is obvious.
If not, then I would start with the power supply, since it is the cheapest to replace and not likely to be damaged by anything else.
Just make 100% sure you get the correct boards. Manufacture can use 2 or even 3 different board these days on the exact same models. Just depends on if it was an early production run or late. Especially on main boards.

I have fixed many devices over the years but I'm not a repair shop. I'm not setup to do that kind of work, especially these days.

I find that a very critical visual inspection is worth hours of troubleshooting.

I hate it, but investing a few hours troubleshooting a unit that you've never seen before is more expensive than simply replacing a board, but may not be as intellectually satisfying.

A given model usually fails in a specific pattern that can vary with age (infant, mid and late life) If you are a recognized (by the manufacturer) repair station there are often very helpful bulletins. In some cases when I've recognized a particular model on the street, headed toward the store, I already knew what was wrong, I did not need to interact with the customer.

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I have a friend who worked as a field engineer repairing corporate computers. Knowing the model in advance allowed him to have a kit of boards on hand. He could swap a board and have the customer up and running very quickly. These field engineers were graduate engineers, not some kid with an SUV full of boards. The board would go back to a central repair shop for repair. The shop was very familiar with that board. After repair the board would be returned to the replacement pool. If the board failed again, it was crushed.

I wish that we could do this in consumer electronics. Unfortunately, relatively few units are setup for quick board swap, desktop computers are one of the few exceptions. There are too many models for a small shop to have a reasonable supply of boards and a tech may not know the models involved until arriving on site. (and the customer may not have correctly identified which unit is at fault) The consumer can be part of the problem too because they become married to a particular serial number and replacing a unit would not usually be satisfactory because the replacement might have a visual difference or imperfection here'n there.

How many years should a company stock boards for model XYZ? Some jurisdictions tax inventory. Even if it's only a warehouse space consideration, it's hard to justify stocking something that may not be needed for 8-10 years. An added insult after stocking for 8-10 years is that the consumer may not want to repair the unit and that board will never be sold. The price of replacement boards must take this into account. (along with handling) This is why a replacement board sells for many times the manufacturing cost.

Another difference is that a business contracts for a service, not a serial number.

Anyone got any links to purchase the main board model DKEYMF953FM06?

[Link: ebay.com]

Thanks I was wondering if any reputable sites had it rather then just eBay that may or may not work.

I used an eBay repair service to fix a board on an LG and it worked very well. They sent regular communications to me, and the repair worked out fine. I believe it was Nick‘s TV service in Arizona.

Thats why I stopped bothering with trying to fix TVs just to save them. If it's a specific application and *needs* to get going again, I'll look into it. But I don't think manufacturers make service parts for these things (at a reasonable price, anyway), so you're really at the mercy of what becomes available from TVs that are parted out. In my experience, Ebay has been pretty good for that.

It is hit or miss, but I *have* run across a guy on Ebay who said that if I could put the part in within 30 days and it didn't work, he'd refund me or get another one. I was surprised by that. But the part worked, so maybe he knows that historically it's a safe bet to make.

There are *so* many models and variants when it comes to this stuff that, to me, it seemed like the success rate wasn't that high for the amount of effort it required.