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TCL 65s421 Roku TV comes on with black screen DIY repair.

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This is a common issue with this 65" TCL roku 4K led TV that includes models 65s421, 65s423, 65s425, etc. The white indicator light at the bottom of the television will come on and blink when you hit the power, but there's no picture and the screen is totally black with No Backlight. But you still may have sound but no picture.
This video will show you how to replace the led backlights in the TV. This is a step by step DIY backlight replacement for all TCL 65 inch 4S series led televisions.
"The ART" electronics course .... bigdogtvrepair...

Опубликовано:

27 авг 2024

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Комментарии : 110

@bobn97 2 месяца назад

FINALLY SOMEONE WITH A BIG ASS BRAIN THAT KNOWS HIS STUFF BROTHER YOU ARE A GOD AMONGST MEN

@bobn97 2 месяца назад

I WANT THAT SCREWDRIVER TOO

@Gregor2Destroy 26 дней назад

This guy's good. I found a 52" tcl tv in the garbage. I spent more time looking for a video to fix it than time actually repairing with This guy teachings. A little bit of sweat and I got myself a new TV. Thanks Robert!

@jamierclark187 2 месяца назад

My kids 65 inch tcl Roku backlight went out. Everything you described as far as the issue is the same. I held phone light to screen etc. Now the fun begins lol. Thank you sir.

@Gregor2Destroy 26 дней назад

This guy is good. If that video would have popped up first, I would have saved a couple hours. I work with a sledgehammer so I wasn't sure I'd pull it off. Piece of cake. I feel like I owe the guy money

@Gregor2Destroy 26 дней назад

Robert, you're the Big Dog! I fixed a 52" TV that I found in the garbage. People don't repair things anymore. A huge thank you and I much do I owe you?

@chrishaizlip5378 Год назад

Thanks for making this video, my backlight went out yesterday and I hate the idea of buying a whole new tv when it basically still works.

@crawdaddy34 4 месяца назад

i was given one of these models.65s425ca (ca because I'm in Canada) with a single show-stopping LED problem .i replaced just a single strip and set the backlight to 60..it's at 100 by default, and all good now. I don't do this nearly as much as you do, but I'm still checking out your course. Rock on Big Dog, and thanks for these videos.

@music4ever159 Год назад

You gave me the confidence to try repairing my tv myself and it worked. Thank you so much!

@chrishaizlip5378 Год назад

I have to thank you again, I went through the process step by step and now have a working television. Bless you for sharing your knowledge.

@KINGAMRUTH 6 месяцев назад

Can you help me also how did you go through the step by step process

@47dumb 3 месяца назад

@@KINGAMRUTHwatch the video maybe

@wendylebs 11 месяцев назад

Amazing step-by-step tutorial! Gonna go try it on my TV that did this 2 months outside of warranty 😢

@SeanJohnson1021 9 месяцев назад

Great instructional resource, very thorough, and especially helpful for getting familiar with TCL LCD/LED Smart TV's before actually beginning to tear-down, or risk breaking anything further, at least back up to the 2018 model. I have a 43" 4K TCL Series 4 LCD/LED TV, still on its factory feet that my nephew knocked over. When it dropped, the diffusion film buckled out of the retainer clips, causing ripples/rings of varying brightness localized to one spot, and was pushing my LCD screen outwards from the bezel (Think swollen Lithium battery). Followed along with this video, all the way up until the suction cups came out, gently lifted/propped the LCD panel up, and gently slid a plastic spudger, or credit card along the seam of the clips ensuring the diffusion film was in fact underneath on all sides, and then gently set the LCD panel back into place. It laid perfectly flat against the no-longer-curled film, and everything went back together in about 5 minutes. Can't tell anything happened to it. Can not thank you enough for the time and effort you put in to making this tutorial. I more than likely would've damaged those T-Con connectors, and did have issues getting the bezel off, until I found your video.

@TallyTechandTroubleshooting Год назад

WOW!! Very impressive, BigDog!! That is quite a bit to disassemble, for sure. Thank you for bringing us along and take care...

@WatsonJohn64 Год назад

I don’t usually write comments but you really saved me a lot with this one thank you to the fullest!

@bigdog8882 Год назад

No worries!

@TheEvon020596 Год назад

Can you send link of where you got the parts gonna see if my husband can fix it

@bigdog8882 Год назад

@@TheEvon020596 shopjimmy.com

@SuperBigd1971 Год назад

Yea Big Dog, My 65" TLC Roku quit working and started to go out and buy new one till I watched your video. So now just waiting on parts, alot cheaper than buying a new one. Thx for the share.

@Gregor2Destroy 26 дней назад

Thank you Sir. Finally someone who knows his shit.

@ibrahemsabresafan7430 Год назад

Good evening my dear friend, I am a big fan of this channel I am Ibrahim from Egypt

@utzpat Год назад

Your video helped me fix my TCL 65" inch tv with the backlight issue. Thank you very much!!

@bigdog8882 Год назад

Good work Patrick

@HugoLopez-xv3xv Год назад

What if i already tried hard reset, the unplug method, also the factory reset i also changed the t con board, the tv tcl 65inch led light under just blinks and barely turns on and turns off, what can i do next?

@kenkitley 5 месяцев назад

Just found the exact TV next to the dumpster at my workplace. I’ve fixed backlight problems before on a lg 55. Thanks for the video man!!

@anarichardson3 3 месяца назад

Thank you for showing me how to fix my TV. I was able to change all of the backlight strips. Thank you

@user-vu6qr3ny5q 8 месяцев назад

Thank You, your video helped me on panel disassembly and what to watch for, I only replaced 1ea LED and the TV was repaired, I did not know condition of the panel and did not want to waste time and money. I cannot tell which was replaced by watching, I give you a 10. Your technique was perfect. I am afraid to tell how I replaced LED but a small torch was used to heat the back side of the aluminum strip....

@seanalexander2362 7 месяцев назад

Appreciate you taking the time to make this video sir.

@pennywiseflyz9130 10 месяцев назад

Good video. I admire ur patience

@wisher21uk Год назад

Nice fix still iffy about using suckers though the way that one lost suction 😮

@miket9010 Год назад

Thank you for a great video, thank you for sharing your knowledge. Watched it, ordered strips and in an evening replaced them without issue.

@ericj5627 6 месяцев назад

the tape is put there so most will break the screen.There is no need for that tape to be there...nice job as always!

@Bjay1987ful 6 месяцев назад

My guyyyyy!!!! WHAT CAMERA ARE YOU USING???? THAT ZOOM IN WAS INCREDIBLE!!!!!!!!!!!!!

@abruptlyblunt 2 месяца назад

it sure wold have been nice to include a link to the parts or at least the part numbers....

@shadowxoxx Год назад

Hey BigDog great work as usual. My TCL Screen turned black also. I assumed a broken PSU board and switched it. Worked for a day, but today backlight was off after 2h use. Later it worked again. Now if I change the brightness from 100 to 60, it doesnt get darker and then the backlight turns off completely. Is it the PSU, the LED stripe or the Mainboard?

@bigdog8882 Год назад

You have to check the LED strips first. That most likely your problem; a leaky led light on one of the strips.

@shadowxoxx Год назад

@@bigdog8882 I'll have to wait till I get all the devices I need to be able to check it. Do I need your device or is a normal multimeter sufficient? Now I'm able to use the TV if I get it on for more than some secs it will stay on for hours, only till something happens like PC (via hdmi connected) restarts, goes to sleep mode. Or when it boots up exactly when windows has loaded and the login screen appears. If it doesnt get anything from outside (hdmi) and I use netflix, the backlight won't turn off. When I want to go from netflix to hdmi 1, backlight goes off 😅

@esepetesegura 7 дней назад

I changed the back lights strips , but my tv is still doing the same thing, still dark screen with sound…any idea why?

@saygoodbye925 10 месяцев назад

Hey Big Dog, Great video would of liked to see how you MM tested the backlights to find the bad strip but I should be able to figure it out. Also would you recommend replacing them all instead of just the bad strip you found? thanks again, great video

@bigdog8882 10 месяцев назад

Replace them all if you have new strips.

@leonjohnsonjr3331 11 месяцев назад

I just did one now I gotta do another one

@LEONDELASIERRA1 2 месяца назад

Sir my tv has sound but the screen is completely black 2 years old onn 70 inch tv

@bigdog8882 2 месяца назад

Change the backlight cap on the power supply. I think its a 350V 10uF.

@LEONDELASIERRA1 2 месяца назад

@@bigdog8882 I ben watching your videos since you started man and it seems you get better by the day! Simple straight to the mother ffffff point..thank you

@whizzo55 Год назад

Hate those type of lenses on the strips. Did a 65" LG a couple of years ago and a ton of them had already fallen off when I opened it up.

@bigdog8882 Год назад

Yeah those LG's are horrible for that. I got a box full of them, I planned on painting them and creating a board game out of them, lol.

@monokendo 7 месяцев назад

My 4K TV turns on but has no picture, only a white ghosting of the menu due to backlight bleed. I tried rebooting, and it worked twice. However, the first time worked for only about 10 seconds before reverting to the backlight bleed, and the second time lasted about 2 minutes. Now, no matter how many times I try, it no longer works. I only see the ghosting of backlight bleed from the menu without using a flashlight. If I use a flashlight, I don't see anything but the backlight bleed.

@carlosfigueroa2249 5 месяцев назад

I put everything back together but the picture is not centered

@user-lf3ob5fn2h Год назад

So I am removing my screen and it has tinted film on the sides similar to window tint. I guess this is to prevent light from coming through the sides? Where can I buy this stuff and or is it really needed?

@user-ym6zj1vj3m 8 месяцев назад

Great video, thanks!

@MercuryRevolution 6 месяцев назад

Che colla uso per fissare la striscia led? La striscia led che ho acquistato non mi permette di fissare un paio di distanziatori, è un problema? La nuova striscia led è leggermente più stretta, è un problema se si vede un pò di metallo attraverso i buchi della carta del fondo? Grazie bro video molto istruttivo!

@Rayzer1989 Год назад

Tcl 60e6000us turns on get tcl logo then blank screen, back lights all work. Have have voltages going to and out of t con, i have no sound everything else kind checks out i am think a main board? Have you ever seen a tcl thats has the logo then nothing but back lights are all working and no discolouration or lines. I cant even check what harware is on the tv

@Rayzer1989 Год назад

Any ideas bigdog?

@Rayzer1989 Год назад

Fixed it all good software problem

@godwinkipokola Год назад

Until now i am afraid of using suction cup , always end up with what if!??

@waltercruz9651 2 месяца назад

Can i buy 65s423 led/plasma panel?

@bigdog8882 Месяц назад

They don't sell just the screens.

@gerardoescalante9611 7 месяцев назад

I replaced the LED lights on the 55S403 but the problem was not solved. How do I test the motherboard?

@jonc.217 Год назад

Where you get your suction cups from?

@bigdog8882 Год назад

Harbor Freight.

@JesseCooley-cj2kz 8 месяцев назад

Any other method besides using the suction cups?

@AndreaLopezPeyton Год назад

how do i know if my tv has 6-LED bulb strips or 8 bulb strips, so in this video there are 6strips of 8 bulb LED's. is there a way i can confirm this without opening up my tv first? my serial or model #? i have a 65inch TCL tv, model: 65S421

@bigdog8882 Год назад

Use the model number and look at a picture of the LED strips

@davidfreeman613 7 месяцев назад

Wouldn't just be safer for me to just replace all of the leds?

@bigdog8882 7 месяцев назад

Always.

@davidfreeman613 7 месяцев назад

@@bigdog8882 ok, thanks bruh, because I ordered new leds 💯

@smallgainz3459 10 месяцев назад

I repaired the back lights but broke the f* screen when putting it back because I didn't have those suckers to lift it up properly

@bigdog8882 10 месяцев назад

Better luck next time. At least U tried! Good work.

@aliciavega5681 Год назад

Where do you purchase your back lights ive been searching for the 50s451 but cant seem to find it at all

@bigdog8882 Год назад

Not having much luck myself, double check the model and see if the 50s421 backlights are compatable.

@adam.gibson 11 месяцев назад

I have a TCL 55s405 that the backlight comes on, the sound is working (I can hear the menu), but the screen is dark. I tried disconnecting the ribbon connectors on the t-con one at a time and doing that 1 side is dark and the other is white. Fuse on the t-con is not blown. I am thinking about replacing the t-con even though it looks physically perfect. I just wonder if it is the mainboard instead.

@luperodriguez466 5 месяцев назад

What do you have the meter on ?

@kordariuskidd69 10 месяцев назад

HeyBig Dog, I need some help with my Hisense 55R6000E. I replaced the Blacklight and T con board. It's still showing no picture. What should I look at next? What part is going to be bad on the main board?

@rogerferguson9604 10 месяцев назад

Do you know how many backlight strips are in the tcls421?

@bigdog8882 10 месяцев назад

Not sure, just look online.

@rogerferguson9604 10 месяцев назад

yeah did that already and even used chat bot to seach..nothing..thanks for getting back with me , Ill just dive right into my repair today and wing it.@@bigdog8882

@elchoppo9248 7 месяцев назад

Wats up BigDog.I ordered led straps but didn't come with doublesided stick tape.What size doublesided thermal tape do I get?

@HugoLopez-xv3xv Год назад

@crazytestpilot9434 2 месяца назад

I didn't understand what happened with the light thing at the start then again with that tester. What is it? how is it connected?what does it do? You lost me at about 3 min. Please try and remember most of us are not trained electronics techs. We need help understanding some basics that are just 2nd nature to you. Thanks for the effort.

@bowie8338 10 месяцев назад

I've got the 6-series 8k, slow white screen issue. Keep wondering if it's a tcon issue

@lloydprunier4415 7 месяцев назад

What is a reasonable price for a screen for one of these and if so where can I purchase it. I haven't been able to find one anywhere on line.

@kegtappereiu Год назад

If the screen is cracked will this fix it?

@JAYFLOPROBEATS Год назад

So yeah I tried to follow these steps my pops TV has the same problem but now I gotta get him a new 65 inch because the black tinted screen cracked the hell up as soon as I tried to lift it off the diffuser screens so...... yeah. NEVER doing this again, I'm buying new TVs when ever they break! IDC how simple the fix is

@richardmack6481 Год назад

Has anyone had issues removing screws around edge of TV. They're very small using #1 screwdriver.

@onetwo1173 10 месяцев назад

Patience and pressure, incremental turning to insure the screw is moving and not stripping, also don't use a drill. Hand screw driver only

@DADEMANA Год назад

lov it

@don7680 Год назад

Dog, love your channel and you are a top notch tech, but considering all the senseless gun violence in the country especially in Chicago, do you think the automatic weapon intro is appropriate? Thanks for what you do, please consider changing your intro.

@viralbull8085 6 месяцев назад

Someone just gave me one of this. tv flashes on the logo and immediately shuts off. I suspect is also an led strip gone sour, I am going to trouble shut tomorrow, doesn't seem to be main board or t con board problems so is either the power supply or an led, most likely led

@qiydaar22 4 месяца назад

Did you ever repair?

@viralbull8085 4 месяца назад

@@qiydaar22 yeah, it was an led in one of the strips, it was partially short and then it shorted full when i tested with the power supply. you need an LED tester for this, they get up to 40 plus volts per strip my power supply only goes up to 30. is a huge cumbersome tv so if you are planning to tackle this job be aware of that, there is a chance you'll break the led screen if you are not careful, much easier handling by 2 people, plan ahead, have a table set up specifically for this job and perhaps another table to set the screen, i just put it over the bed, have crazy glue on hand even if you are planning to change the whole strip, if you knock one of the light diffusers (the clear plastic cover over the leds) you have to glue them back or else you are going to have a light spot on the tv when you turn it on, thats what i am dealing with and i am going to have to open the tv again to glue the diffuser cus it seems that it fell. if you change the whole strip thats going to be more expensive but safer. be careful on every side of the screen, there is plastic ribbons with chips on pretty much every side of the screen except the top if you tear one of them, is game over. fun project, a little stressful but very doable, have fun

@nbctcp3450 6 месяцев назад

actually u don't hv to replace whole led bar. replace 1 led is enough. that led bar I believe is in serial. just make sure led has same model otherwise that 1 led look brighter or dimmer than others

@stefanmuller5056 Год назад

👍

@debbiejones346 10 месяцев назад

😊

@justinerickson282 7 месяцев назад

I’ll just buy a new tv.

@sunsys0 Год назад

Too much of unnecessary talking which is totally useless and just waste of time to increase time of the video, this would be over in 15 mins if bigdog did less talking, I mean if a technician cannot tell right side and left sides parts then they cannot be helped, stop wasting time on teaching them, get on with your repairs. Stopped watching in 15 mins, unsubscribed, he does nothing else but s2pid backlight repairs, nothing to learn here.

@wisher21uk Год назад

Shut the door on your way out then off you Trott

@bigdog8882 Год назад

This Video is not for Technicians, hint "DIY" in the Title. I have to explain everything so people won't damage the TV while doing this. So So instead of publicly complaining like a litl bit..h! Just go watch someone else's video's and turn the Volume down.

@wisher21uk Год назад

@@bigdog8882 totally agree ☺️

@sunsys0 Год назад

@@bigdog8882 come on BD you can do better, you know very well you are talking c**p and a lot of c**p and BTW do some real repairs sometimes at least 😂

@Bunnyboiler5069 Год назад

That's rude for no reason.

@sleepdafiend3983 Год назад

Super amazing dude

@stevemenold6095 3 месяца назад

My question is : where are you located ? I have a Hitachi Rocu 50 inch, no picture! However I do have sound. TV is approximately 7 years old and a great tv . HELP PLEASE! I’m on a fixed income at 65 years old and can’t afford a new one 🙏

@sicretservice Год назад

Сколько матриц грохнул с помощью этих присосок? В Штатах ремонтируют это говно? Они у вас стоят копейки.

@eroticmasterbaker 3 месяца назад

What does it mean if the tv comes on like normal for a split second then goes black with the image visible with flashlight. Is it the power supply or bad led?