Sharp LC 50LB371C TV Backlight Repair (DIY home repair!)
Vložit
- čas přidán 31. 08. 2019
- This sharp tv would turn on but had a black screen. It turned out to be the back lights.
links below to led's, Suction cups and much more! (note uses 3V 1W leds)
Note I have made a more detailed repair of this TV in the below link
• LG 55LB6300 Backlight ...
Link to the leds ebay.us/lnm771
To do this repair
1. Take off the back assembly
2. Take off the front screen assembly
3. Tape the ribbon cable from the LCD to the back of the LCD panel
4. Use suction cups to remove LCD panel
5. Test all LED strips, take out any strips that are bad and fix them it helps to put them all in a row and do them all at once.
6. Re-install them and double check that they are all working
7. Re-glue the led covers
8. Re-assemble the TV.
Essential Tools
-Two suctions cups (amzn.to/2KF84r7)
-Led tester (amzn.to/38lRq89)
-Tweezers (amzn.to/2WpWEdg)
-Screw drivers (amzn.to/2LTftUp)
-Wire cutters (amzn.to/37wNJx9)
-Soldering iron and Solder (amzn.to/38gXFdg)
-New leds 3V on ebay (ebay.us/lnm771)
Recommended tools
- Heat gun and solder paste (amzn.to/3p3kGXS) (amzn.to/38iKE2F)
- ICE cube tray for screws (amzn.to/37wMwWB)
- Electric Drill (amzn.to/34m36GH)
Tips and tricks
You can do this job without a heat gun just watch my video.
• Insignia Roku Black Sc...
Please subscribe to my channel - Jak na to + styl
Any Questions just ask them below
hi, these are the Symptoms for my sharp tv model lc-65n7004y i see the sharp logo at power up, it is brighter on the left than the right, i have no sound, i tried the flashlight test and see nothing, the power light is a 5 long and 2 short then the power light goes to red. i have changed the power board and there is not change thank you
@@cosmo0080 looks like your backlights are bad use an led tester to be sure.
@@NewsonsElectronics k, i will have to go buy one thank you
If the Sharp logo comes on, and sound is working, tv menus are working but the entire screen is mostly blue color - does it mean that LED’s need to be replaced as you’ve shown there?
@@amosfeldman9454 yep its the led failing
ICE CUBE TRAY WAS GENIUS
Really helpful bro saving me well over $300 the repair shop was gonna charge me. I appreciate the video brother.
What a genius idea to use a ice cube tray as a screw holder! The multiple trays inside help with screw management as well! Thank you for the video!
thanks
More detail would have been nice in removing the LCD panel itself, instead that part was completely skipped. I have replaced a few panels in some LG tvs and never came across adhesive holding down parts of the panel, if I would have known that I could have preemptively run a knife along the outside edge, instead when I went to lift the panel it cracked because a part of it was held down.
There is also a clip along the bottom that needs to be removed before the rest of the trim is taken off.
The TV is now garbage, along with the new backlights I bought for it.
I have updated a video to explain the repair in more details. czcams.com/video/jUdS-lCx1F8/video.html
I actually had a good time and enjoyed fixing mine like you said you just have to be very careful and it is kind of stressful a lot of screws the first time I did it I put it all back together and I forgot to put the diffuser cap back on worst feeling ever had to take it all back apart again put it back on and put it all back together again lol and I did it on the floor like you so it's a little rough on the back if you have a huge table that would be ideal
This worked spot on for me on my Sharp LC-50LB370U. Thanks Newsons Electronics. It just seemed likely the the LEDs were to blame. Sure enough I had 3 bad ones (although in hindsight I should have checked the power supply first as the amount of work involved to get to the LEDs is significant). I didn't have a heat gun but managed with a micro torch after practicing a bit on scrap steel of similar thickness. Of course as someone else mentioned there is still the possibility another LED will fail soon. Indicator-type LEDs can last a generation but it seems the higher the power the less reliable they become.
right on
I have a sharp lc55ub30u that has a power light but no screen glow or any signs of life if i press power it acts like it wants to turn on but that's it it doesn't get any backlight or if i hold a flashlight to it doesnt show picture i replaced all the boards inside the chassis what is causing this? surely it couldn't be the leds could it?
Great video BTW, any chance you know what the voltage for the led is coming from the power supply ? I would like to test it befor I bother ripping it apart. I have video I can see it in the dark with a flash light, and I have sound. Just no back light
3V
Thanks bro
no prob
Right, found one :( , thanks for video, helped, now looking for one led to buy
here is a link for the leds ebay.us/lnm771
Hi was wondering weather or not it’s cheaper just to replace my 60 inch as it’s lights have blown but I can hear and everything else but not see anything
i could fix it for $120 if you are near fergus ontario. canada other then that phone around and see if someone could do it.
So I have a similar model the backlight went out but the sound and picture remain(can see when I shine a flashlight) which board should I try to replace
its not a board it;'s the lights under the LCD screen
Use an led tester and test the LEDS the wires will come through the metal bezel
I have the same tv I tested the led connector I got 68.5 volts each for led 1 and led 2 I hope those are the correct voltages since they are not labeled on the board
as long as all the leds light up it is fine that voltage is for one strip in series.
@@NewsonsElectronics ok that's what I needed to know the strips won't light and the voltage was 68.5 so that means new led strips . Thank you
@@Ibelieve218 you can just replace the broken leds like in the video as well
Do you know the voltage rating of those led? i am told some have 3V or 6V
3V @ 1 WAtt
Great video!!! where can I buy the led light? Thanks!
My sharp has red light on main power but it can't on, once I press the button the light off
In the description
What if the led lights up but is only half brightness and also I heard it it is just one or two led you can solder over them to bridge the connection, is this true?
you can\t solder over them because they will then drive at a higher voltages eg. the other leds will go.
You go ahead with that idea and you will regret doing so as you blow out the rest of the Leds due to increase voltage and current.
Hi there- I’m 99.9% sure this is the same issue I’m having with my same model of tv. What would you charge for this repair- I’m located in Hamilton so not too far. Thanks :)
for 50" TV it would be around $80 but I am closed for the moment, you can check newsonselectronics.ca for more info.
Will these LEDs work for a SHARP LC-43LB481U?
yes I believe so the only two types of led I saw 3V and 6V but 3V is more common
What number pin protec ic driver BL BD8779EFV . (Sharp lc 29le440m)
not sure?
could you possibly give me the part # there are hundreds of led's to try and match up , thanks in advance Frank T
www.ebay.ca/itm/100Pcs-3228-LED-SMD-Lamp-Beads-3V-for-Samsung-LED-TV-Backlight-Strip-Repair-TV/223460291927?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
thank you , Merry Christmas to you all Frank T@@NewsonsElectronics
@@NewsonsElectronics thank you, I have the same TV with same problem, will try to repair it with on one of the LEDs wish me luck
@@NewsonsElectronicsExcellent vid. I've subscribed. I thought in the video you said 3030 leds, not 3228s. Thanks for the clarification.
@@YuDaMan both should work as long as they are 1W rated
Any way of removing the led without a heat gun? I have a soldering iron
just snip it off with a cutter tool
czcams.com/video/eCG1rg7dVIQ/video.html
Great video! Would you consider selling a few LEDs?
they are ready to go
please like the video and subscribe if you wish.
How did you find that it was not power supply?
does it have standby voltage of 5v is so it' probably good. If you can see a faint image with a flashlight your power supply is fine.
@@NewsonsElectronics i have 5v, and with flashlight i see picture. I took it apart and found that led strips are fine. Ordered replacement power board. Will see if will make difference.
@@Home_made_ch sometime it's just a bad connection on the led strips. get an led tester
They can’t be 3cm for a tv backlight led, it’s 3mm, if it was 3cm then they would be huge
lol 3mm x 3mm
Smh DIY he says
indeed I did it at my home