EazyBone
Badcaps Legend
Last Activity: Today, 12:06 PM
Joined: 06-23-2023
Location: USA
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Not sure what your even asking anymore. Good luck. -
Yea, you stick one lead somewhere and one lead somewhere else. Pretty easy to learn. And there is a legend on the right side of the board that tells you the voltage your looking for. But first you would check if the fuse is dead.
Of course you should only do this if your comfortable with it.. while a TV is plugged in you can obviously zap yourself. But the area on the right is the cold side of the board which is pretty safe.
This is why the forum is here. To help diagnose. We can't tell you if the PSU is dead or not because you can't test it otherwise. You can take...Leave a comment:
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Red light not on doesn't necessarily mean power board. Main board also causes this, as main board sends signal for the red light.
If it was a Sony, chances are main board. If Samsung chances are PSU.
LG.. depends. This is why multimeter is important. Can't see if things work or not without it....Leave a comment:
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It translated well.
Do you have a multimeter? That would be how you would start testing. They are $5-25 for something that would work in America anyway....Leave a comment:
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Probably cracked solder ball joints. Usually what happens on bga (so I'm told) people have equipment to X-ray it. I do not have that luxury...Leave a comment:
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Read over this thread and the links carefully. This should be the answer. No guarantee but this is probably what it is. I've run into a few now with this board issue and it's always the problem.
https://www.badcaps.net/forum/troubl...aa-won-t-startLeave a comment:
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This has probably been answered.. I need to find the thread. The main board goes bad. Reflowing the CPU on the top left is the fix for it. I'll try and find thread....Leave a comment:
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Yes. Harbor freight double suction cups . Screen will flex a little bit but they hold up fine. After 75 inch you got to go slower but 1 person is best as I've done 2 people before also....Leave a comment:
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I would look for the picture again when it's black. I am a TV installer and we install all TVs as close to the wall as they can get . Going black with sound is a indication of backlights going bad.. so I would look again when it happens again. Is this an edgelit tv?Leave a comment:
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I did not no. I do this in my garage with 2 tables and transfer the screen from one table to another with dual suction cups for each hand.
ARe you trying to change backlights in a TV?...Leave a comment:
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When it goes black take a flashlight to screen and get really close. Do you have a picture? It will be very dim so take your time looking for it...Leave a comment:
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TV really is pretty nice. Good brightness and color.
All fixed up. Serious pain in the butt to get the frame/panel off but it came off...Leave a comment:
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In my experience it's not worth the headache. I can do backlights all day no problem. Once I have this TV with the tape you have to cut .. it's always a pain in the ass. Debris behind the screen makes you feel unprofessional so you have to fix it.. and then it takes 2x longer then you wanted. I'd say good idea....Leave a comment:
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Yea I found the leds for this TV and ordered them already. Thx for all that extra info. I think if I would of given the tv to a neighbor I would of left it but I just ordered a strip of LEDs instead. It's nice to know about this trick though. If I don't break the screen I'll post back. This is the one where the screen is attached to the bezel, I prefer to take off the frame and screen together rather then dealing with all the crap that's made after you cut through the tape....Leave a comment:
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Good advice for fixing the TV and the debris.
My advice is just forget about it lol. The headache that this type of TV repair isn't worth it. Debris gets everywhere from having to cut the tape to get the screen off. The tape is black and so is the screen and it sticks really well to the TV after cutting. Impossible to see until you put it back together. It can definitely be done because I have done it.. but it's not much worth it. But howards tips are very nice.
Since it seems your job is repair tvs good luck! Ali Express or eBay has the tapeLeave a comment:
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So it at least helped me to know that the backlights are out. The TV now stays on longer then 15-20 seconds now. And because I couldn't really test the LEDs without taking it apart and .. let's face it this things 85 inches and expensive LEDs .
So turned on screen test and can see visable black spot where LED or LEDs are out. Looks like I need some new leds to fix it.
I'm sure someone who doesn't need to replace the LEDs can get some more life out of it doing what I did for personal use but I can't sell this until it's fixed now that I know the definite issue.
...Leave a comment:
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Sony 85x90CK 4 red blink
So I got this Sony and purchased it working.. got it home and it was 4 blinks red. Seller actually refunded me thankfully. Now it's massive to take apart and I know 4 blink can be the panel sometimes but not always..
But I found a method through other ways with grounding out the bl error pin on the LD driver board. Now the tv turns on and works.
Pin is number 27. It was either remove the resistor right next to the solder pad or solder the pad to ground. I soldered the pad.
Now what is this going to do to the tv? Is it just going to die shortly down the road?... -
Yup figured this one out....Leave a comment:
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Yea id agree, likely a reflow of bgs chip. I have this exact TV same problem. Although I didn't watch the main board while reflow and it bent it and no longer works lol so oh well....Leave a comment:
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Agree, looks like a piece of paper or tape for in-between the screen and the light diffuser.Leave a comment:
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