Friday, September 22, 2017

Repair LG 60PB6650-UA not starting or starting with no image due to failed YSUS EBR77185601

Just fixed three YSUS boards EBR77185601 all with the exact same failure symptom and I think I narrowed it down to the essentials that need to be replaced for it to not fail when you try it again.

EBR77185601 is used in LG 60PB6650-UA, LG 60PB5600-UA, LG 60PB6600-UA and possibly others.
My experience is summarized in the below video:

The board failed twice on me until I had it all figured.
Actually there were three failures, but it turned out the last one was not the YSUS itself even though it sounded and looked a lot like it, only when I took it down it was all good and upon long and close inspection I found a noise filter cap busted on the top buffer board:

The video mentions that, but doesn't include the picture, which I took before finishing the work and ensuring everything worked fine at which point I made the video.

DIY repair kit:

For repair service, exchange service and more please search at !

Thursday, September 21, 2017

LG 31MU97-B main board exchange and repair services now available

A few years ago I came across the 31MU97-B 4K monitor.

It was love at first sight, partially because it was beautiful and probably just as much because I got it for about $20 (it was $800+ new) total because its display was coming in and out and it was rendered unusable.

Turned out it had  a tiny detachment  on one of the display tabs and I found the location and was able to actually fix it...somewhat.

I stuck a piece of hard paper between the LCD and the front bezel - it was even hidden from plain view - and that caused the detached tab to make contact well enough to a point where the TV would work for say 30 or more minutes.

Over time, however, probably due to the paper going thinner, it started failing more and more again and it got to the point where I pressed a little too hard one day and it cracked.

I had already gotten used to it by then and just bough a refurbished one, which I use to date and still like.

The parts of the old I listed on eBay and this is how I learned about someone wanting to get the main board.

I don't remember the details, but he eventually ended up sending their board to Coppell TV Repair LLC and we took dab at it.

Since then we've repaired a few other dead main boards from different LG 31MU97-B monitors and we've seen two different issues develop on those; I am sure there are more that will show over time and I can't be certain we'll be able to identify or fix all of them, but for the time being we are glad to offer exchange and repair services:

1) Exchange service for LG 31MU97-B main board (or rather buy a good working board and please please return yours without being tampered so you can get credit for it):

2)  Repair service for LG 31MU97-B main board:

Note that sooner or later someone would either buy a board and not return theirs or return it and we won't be able to fix it; which means the exchange may not always be available.

Friday, June 9, 2017

Repair Sony KDL-56XBR6 A1557397B T-CON 1-857-253-11 A1556899B

Coppell TV Repair LLC now offers repair service for Sony T-CON board 1-857-253-11 / A1557397B / A1556899B / 1-877-777-11 / 55.46T02.C05 / 55.46T03.C03 used in the below listed TVs:

Wednesday, May 17, 2017

Vizio XVT3D554SV, XVT3D474SV and XVT3D424SV repair offered

With a few years delay we're updating customers and Internet in general that Coppell TV Repair LLC is offering repair services for the main boards for the XVT3D series from Vizio, namely:

As with  (almost) everything else, we test those boards both on the way in and the way out of the shop as can be seen here:

We also have replacement EEPROMs for those main boards, which you can find at

Every now and then we also have boards available for purchase with trade-in option for the old dud (CORE purchase), but customers frequently either do not return their boards or return them so badly damaged they either can't be repaired or can't be sold or warrantied because of the way they look....and that unfortunately ends up the sale-repair-sale cycle until anther board becomes available.

Wednesday, May 10, 2017

Samsung UN50H6203AF no image issue troubleshooting

In the past month we've seen a few units of Samsung UN50H6203AF in the shop with the same issue - TV starts up, backlight is there, but there's no image on the screen even though the T-CON LEDs are on in blue and it appears as if the T-CON is just fine.

Testing output voltage to the LCD panel shows that at first it gets a spike of proper voltage, but then goes down to 0.

Then we actually ended up "repairing" (though frankly I still don't dare call this repair) one of them with another one currently waiting. The "repair" is something we've done before as a last resort by means of losing portion of the panel and re-purposing the TV for digital advertising or other situation where one could go with missing an inch or so of the display.

Friday, April 28, 2017

Repair for DELTA DPS-171CP A / DPS-162KP-1 power Sharp LC-70C7450U LC-70C8470U LC-70LE847U now available

This is just a simple announcement that Coppell TV Repair LLC is now offering a repair service for power supply board DELTA DPS-171CP A and other boards based on PCB DPS-162KP-1 as shown on the image below. The following Sharp models are known to use DPS-171CP A:

There are several different problems we've seen with this board.

One is where the board is totally dead and there is no +5V standby voltage. The TV is then totally dead, of course.

Another is failure to turn on upon being told so by the main board; this results in series of two fast and two slow blinks in the TV.

There sure are failures we have not seen yet.

Monday, April 24, 2017

Which board to send for repair - original or one from eBay?

QUESTION from the mailbox:

Item: VIZIO XVT473SV REPAIR SERVICE FOR MAIN BOARD 3647-0312-0150 / 3647-0312-0395

Dear coppelltvrepair,

Have two boards, original and one purchased on line. The original has the blinking logo- will not turn on. The purchased one (got screwed) seemed to work, but no picture or audio at any port, otherwise responds to inputs.

Which card would be best for repair. No sense it repairing both of them.

(short): Send both!
(long) : A component level repair of something you have not yourself created is hardly ever a certain thing (more on that shortly) and the truth is we do not know for sure if either of the two, or however many boards you have, will end up functional. We have some statistical data, of course, and if listing is still up then this statistical data is in our (and your) favor that yes, it will be, but it's still not a sure thing.

Without knowing what is wrong with a board it is wrong to assume it can be fixed and without having seen and inspected the board it is wrong to assume its condition.

We do know for sure, however, that the more boards we receive, the higher the chances of a) us having them at least one fixed and working well; and b) us failing to service one, at least in a matter that makes is practically meaningful for both parties.

The very best guidance we can give is that we do NOT want boards that have visible signs of tampering (says so in the listing), traces of rust or other reactions resulting from nature or human impact on the board.

I can also say boards from random, small eBay sellers can easily come with invisible and possibly fatal defects; say user Joe has parted his TV and possibly a few other TVs and has made a little side business selling parts...Joe wouldn't be handling boards professionally, he's probably stacked them somewhere or threw them all in a box and when one sells he just goes hunting for it in one of the boxes and pulls it out.

Boards lay back to back, they scratch off each other and SMD capacitor or resistor or diode easily gets ripped off in the action. Good luck finding it!

Of course you aren't guaranteed against that happening with any board, but you get the point.

So to summarize, if you have one or more boards you pick the one that looks the most neat and send it if you want to send just one, or you send several if you want to increase the chances of us producing a working board.

You can have the rest back, we won't repair and charge you for more than one if you want one. You may end up paying a little extra and , worst case scenario, you may received back a board that has been worked on and it's still not functional, but that other board you'd send may as well save you another money and time for the mere cost of a combined shipping surcharge.

You can have your boards back or you can leave/sell them to us (no guarantee we'll be buying anything, but we might make you an offer if you indicate you do not need more than one back).