Excellent troubleshooting technique and clean delivery/presentation. Like you said, most people would think that it is the Power board. However, you tested the power board by explaining the pins and their voltage table printed on the board. Also pointed out to the LED lit up once I/O board was disconnected from the Power board confirming that the Power board is OK. Not only that you showed what numbers to look for when ordering the I/O or Main board, which is very important to me. Thank you very much for your time in recording, presenting and sharing. I liked it. Congratulations!!! I will look forward for your other videos.

Just had the same problem with my 43” Samsung. Standby light on but no image or sound. Ordered both the I/O and power supply board. Turned out to be the power supply board. Back in commission. Thanks for the upload!

Great video! speaks clearly, explains how to check the voltage, and most importantly doesn't give a 30 min introduction or "unboxing" of the product like so many other videos out there. Thanks!

Thanks for posting this video. Its just helped me in repairing my own Samsung 55" Curve, UE55MU6500U, Costing me £50 for a refurbished PCB in the UK. Kind Regards

Nicely and clearly done video. My TV dead few days ago and it's has the same symptoms like yours. I'm hoping I can fix it. Thanks for the very informative video.

Thank you so much! I was following along and when I went to check the power side my meter would fluctuate and the lights for screen would flicker on and off. Turns out it was the power board. $34 later TV was fixed, got my part ShopJimmy. Thanks again.

My LG 55 Curve OLED has same issue. It works for approx 30 secs then switches off. After watching this informative video I have a much better understanding. Thank you!

I'm so happy I found this video. I would have paid much more to have it fixed by a repair shop. Thank you!!!

Excellent teaching method of showing each step, level of difficulty and final result!

What are the odds, the first video and it's my exact tv and super easy fix. Thank you for making this video, I've fixed old school hd tvs where the caps on the power side were usually the culprit so it's nice to have someone who knows what they are doing make it easier.

Just bought a Samsung 65" .. 7100 series .. possibly as old as 2013. Bought at auction for less than $100 .. got it home and plugged in .. black screen. Standby light is on, blinking. Watched 3 different videos this evening on how to possibly troubleshoot and fix. Your video right here may get me to where I want to be. Will try removing back cover and 'testing' the board(s) tomorrow. Will come back and report here if successful using your methodology. Thank you for your video to help me get started.

Thank you for the vid, it helped me to fix mine that had the very same problem after 2 years of use.

Great DIY video. Detailed and straight forward.

This was a very good video, on how to DIY, an electronic repair, using basic electrical and troubleshooting skills to arrive at a possible determination. That being the computer board, and finding by researching a good value on both the power in and power out boards. Kudos for the good video!

Thanks for a nice and clear video, as this gives me the confidence to take the back off my 50" LG that also is not powering up at the moment.

My first thought too would be the power board! Thanks for your input!

I have the same TV only a smaller size, bought at the same time (about 5 years old) with the same problem (solid red light.) And got the same quote to fix it - $500. Haven't opened it yet to analyze. Not sure how reliable Samsung is with so many people with the same problem. Thanks for uploading.

Very good video. These TVs in reality are easy to fix most of the time. This video clearly show that. 👍

Thanks for the vídeo. I think my tv has same issue. I measure the power delivery from the power board and everything looks good. (Also LEDs goes on without the i/o card as yours) Searching for I/O card replacement. Saludos desde México.

wow salute u mr rough rider very clear and fully detail all i need is there 10stars for u many many thanks

Excellent fix & Explaining as you went along, Glad it worked for You! Hope it will work for me too lol

YOU ARE THE MAN!!! I AM A RESELLER AND GET NERVOUS ABOUT ELECTRONICS THAT ARE NOT INITIALLY WORKING. THE WORLD IS NOW MY OYSTER! 😂😂😂

All would do well to see how a most informative and articulate video can be provided. I fix all that breaks, because of Post 2008 finances, that force me. Really, I love doing all types of Repairs, But this is not my forte. Now, I:m confident, with your fine tutelage, that my 65" Samsung will recover By my hands!. Take Care! Lee, FL

Our year old 75 inch Samsung and our WiFi box quit after lightening hit our house in Switzerland. Easily replaced the WiFi but think our TV is toast. I could try doing your fix but would probably ground myself in the process:) Excellent video though.

You basically helped me fix my TV. Ordering the part as I type this. Thanks bunches man!

Thanks for the troubleshooting steps, it surely helped. Had the same on a 24" samsung monitor with a solid red. After spending time diagnosing, it pointed to the main board. Ordered one and installed it, now the red light keeps flashing, does not power on. Time to keep troubleshooting...

I have a TCL 49 TV with similar symptoms. Thanks for the break down on measuring voltages from power board to main board to decide what is bad.That is the step I am at now. PS I would stay away from TCL tvs terrible customer support. TV had almost no use but was out of warranty.

Thank you for making this video....gives me some confidence to do more troubleshooting with our TV.

Great video,👍 explained with great detail.

I am glad I found this video I have the exact same unit, popped in a new pb and still same results

Thanks for this video! Was able to bring my tv back to life for $40!

same exact problem. thank you so much for this video. ordering the board now.

Thanks ny brother. I have a degree in electronics too. I feel good fixing my tv now.

Well done enjoyed watching, not sure if I will go that far to order a new one.

Thanks Rough Riders, for informative video.

Thank you for your time and clear explanation. Now to fix my Hisense TV which is not powering up at the moment.

Yes I have a question. Can you come to my house? I bought a 50 inch TV for $10 at a garage sale and it doesn’t work red light comes on but that’s it. Straightforward video! I learned something today! Thanks

This is exactly what my TV did. I don't know if I had sound or not. I can see the power indicator light or red stand by light. Turned off all lights in my room with the TV on and I'm not seeing any lights threw any holes or anything in the back of the TV. So it sounds like a bad power board. I'll know more when I get it apart. Thank you for your video. You made it all look pretty easy.

The 15 second power button hold worked for me on my nano cell. Thanks!

I don't have a Samsung, but this is great general info that could apply to my TV as well.

I have the samsung qled 8k purchased three years ago purchased the 5 year warranty. Last week was watching The View abruptly there was several q squared pixelation then turned off. Tried the little troubleshooting steps to no avail. However, I would say I still have power to the tv but won't turn on. By watching your video enlightened me to believe its the same issue at the IO board went bad considering that my power board is on electrical currently passes through the tv since the standby light is on.

Good video. My 5 year old Samsung 55 inch shows the red power light on but black screen persists. If I play with the remote long enough (sometimes pushing the on button, unplugging the set for 5 minutes or so, plugging back in and pushing remote on button many many times) it will eventually power up and the tv works just fine, until I turn it off and the whole process starts over again. It's not a smart tv so it may not be worth spending $100 on to fix when I can get a new Hisence (may not be spelled right) smart tv for under $500 bucks . Hate to throw this tv out when I know it works though.

Thank you so much !! I turned it off and turned it on as you suggested... Yippee it works 😊

XLove you man thanks for the video I was about to throw my $1500 LG 65 inch TV in the trash until I seen your video I’m hot on the repairs thank you

Excellent, detailed repair.

Sir, you save me a trip to Best Buy. Thank you very much 😊

You gave me the Best Info, after so many videos. Tks a lot!!

Probably the faulty parts in the main board are the mosfets or smd capacitors, using your dmm in the continuity mode would do the work. Thanks for sharing the video.

Its nice the way you explain things good work my friend

Thank you so much for sharing your time and knowledge with us all. I do gig work to help others and your video was very informative. I just subscribed and liked your video. I watched it to the end.

Good troubleshooting. Thanks for posting! God bless.

Shop Jimmy is a really good and honest place.

I'm here again after a month of waiting for the parts delivery. Thank God I finally can fix my TV with your given tips of how to diagnose the tv and i knew that my power board is faulty because of the burned mark so I bought a new replacement and it works perfectly. Thank you. Btw is it possible to fix the tiny smd chip (sized about 2mm) on my faulty board? It seems some of them if fried with the board around it. Is it even possible to repair it?

Straighforward indeed and worthwhile only if below 100$ for an >= $500 TV. Thanks for posting.

super good DIY video, keep up the good work

Super video. and very good explantion while gooing trough the search for the falult. Good job. i will try myself now on my TV :)

Great video I’m testing mine out now! Hopefully self fix it.

Get to it and you didn’t make it complicated for people who don’t have that knowledge thank you

I was surprised you didn't record the voltages on the bad board before you replaced it. That way you could T/S the bad board and possibly repair it. Just my thoughts on having a spare board.

Great work and you fixed it! We live in a disposable society these days and because of that more waste and garbage is produced. I am one who'd rather fix things than throw it away. 👍👍

Thank you so much God bless you!!!

Very good video 👍👍👍👍👍 Mick UK 🇬🇧

Awesome, sir. I just replaced the tv with a monitor, although now I'm wondering if I should seek to do what you did. But after seeing how much you paid for the extra board...I might as well just get another TV for about the same price! The TV I'm watching this video on is the same model you just fixed.🤣Nice video anyway.

Sounds like my own 55" JVC Tv. Looking forward to fixing my tv. It's a pitty i dont know where to get the boards in south africa

Hey, that's just like my workbench! The kitchen counter!

Hi I have a LED 40'' Bush TV with built in DVD player. The standby light comes on but when you go to switch it on the blue power light comes on then quickly goes off again and goes back to red standby so TV does not come on. There is a lead from a white socket connector from the board that runs to the standby switch mount then across to the standby light with another connector. So could this be a problem again with AV- board as it looks like the only board it has besides the DVD board. I'm looking to replace the whole board for a new one, I'm only looking for a brief outline of a probable cause, so any advice will be very much appreciated, . . thanks

Thank you sir for this video

You are amazing! Thank you for the step by step guidance!

Thank you this was helpful and understandable..

Thanks for sharing such video. It is helpful for me to repair my Samsung Curve TV

Wow mines is the same issue. Ill order the parts. Thank u for the video

Cool thanks for sharing your time 😀

Great video. Helped me alot.

Thank you for making this video.

When you stated you have EE Degree... I was hoping you would ACTUALLY repair the board... However... THANKS FOR VIDEO!

Very informative. Thanks for the tip👍

Thanks boss! Very informative, I hope I can fix my TV too with the same symptom and save some Peso. :)

Thank you this was very helpful information

Great video.....I have a Samsung 75" Q70R and it went black screen while watching a movie, it flashed blue every 20 seconds, I have some knowledge in electronics so I opened it to see if it had bad capacitors. With the TV energized, I disconnected the ribon cable that goes to the main board and the screen turned blue, so I assumed it was not the damaged screen, I have been looking on ebay and I have found the original power supply parts, do you think that replacing the board will solve the problem?...thanks

Good basic trouble shooting techniques except for when handling circuit boards a wrist grounding strap as an additional Safety step to protect the electronic components.

Excellent video! I am having almost the exact same issues with my Panasonic TC-39AS530U. TV turns on, screen flickers 3 times (I can see the LED lights flickering in the back), then I get a blank screen with 1 LED flicker (error code 1 I assume) then just a slowly blinking red LED. There is no sound and I can't turn it off with the remote. I have to press and hold the power button on the side of the unit or unplug it to turn it off. I have tested my power supply board. ALL 3 test points (standby, LED driver, and main board) maintain voltage when it goes from power on to blinking light. However, the pins on the connector for the main board and driver board go from 16V and 24V respectively down to 0 when the light starts to blink. There are 3 test points on the main board, 5.3V, 12V, and 15V. The 5.3V (standby) maintains voltage when it goes from power on to blinking light, the other two do not, they go to 0. Would that, along with voltages being maintained on the power supply board, indicate that this main board is bad? I really hope that is the case as I do not want to get into replacing LED strips. Thanks and keep up the great work! P.S. I have put in new power supply and T-con boards and the problem continues.

Wow it worked!!! Thank you.

Great video, thanks

Are you responding to questions on this video still? I have a 75 inch Visio that went out last night. Half of the screen turned A pinkish white color or whatever color and the other half of the screen remained working. I turned it off and then back on but the screen never came back on. The audio continue to work but not the video. Any suggestions?

Very brief and complete. Awsome . When i plug in my tv (after being un plugged for few minutes) a white led light blinks on for a couple of seconds and then nothing happens. Ive checked everything like remote control batteries and all is fine. Tried to power on from the tv box too, nothing happens. The tv is directly connected to wall. Please help me understand the problem and how to solve it. Many thanks!

damn I watched your video and was totally inspired to try and fix mine . inspected all the boards did not see any burned out marks . went to shop jimmy and decided to buy all 3 boards because i do not have a voltage meter was about 40 for all 3 replaced all 3 and it's still doing the same thing any suggestions ?

If you get the blinking light but the tv won’t start then try a hard factory reset first. For Sharp brand tvs you unplug the tv and then hold down the vol - and input button while plugging tv power plug back in to wall. Hold the two buttons until you get a fuzzy screen. Then unplug tv again and hold down power and input button at same time while plugging back into wall. Now you will be in factory reset menu. Fill out and then save and restart tv. You might be able to skip the last step after you get snowy screen by turning off and then turning on tv and going to channel 3.

I changed the powerboard first still gettinga red flash. Going to change the main board next hopefully it works

Did your old lady let you leave the tv on the kitchen countertop for the whole time it took to fix the tv ? If she did, you have a great one.

I’m having a problem with a Samsung DLP HLT-T6189S. If I keep turning power on, it flashes green, then it stops, but the screen won’t light up. Repeat this a dozen times and I can finally get it to light up. It’s taking longer and longer for that trick to work. I may be doing what you just showed me

Great tutorial

you dumded it down perfectly awesome video !!!!!!!! i dont want to pull my Lg apart yet because my basic knowledge of aircraft electronics tells me i have a different problem. would you mind giving me your advice please ? my rred stanby light is blinking steady, tv powers on all apple tv apps appear etc. everything starts to work as stanby light turns blue, then blue light starts to dim and red light comes back on. All this happens in approx 30 secs. Also while googling someone wrote the hdmi cable could be an issue. changed it out ! watched a 2 hour movie last night. Tonight right back to square one lol any thooughts ?? thanks in advance.

Good job! Mine turned out to have erroneous voltage coming out of power board

I thought the other pins besides your standby would be zero until the tv was told to turn on? On my tv all of my pins are reading zero besides standby voltage, and they all go to the correct voltage when I jumper the standby to the on/off pin. I’m not sure if I am thinking of this wrong. Thanks for any info you could provide.

Nice. Congratulations.

Very helpful thanks

I have an issue with my 49 inch Samsung LCD...when I plug it in, it only flash a red light and turn completely off. May I ask what could be the specific board in question?

Good lecture I'm happy for you

Same issue as per my findings as a Computer Engineer, but not finding my specific board for replacement in India. As of now the TV is sleeping.😃😃

Usually its those microprocessor BGA chips under the heat sinks that fail, either broken solder or just failed.