I turn the tv on and the screen flashes while its black with no sound or anything coming out of it. Acts like it is power cycling. Eventually the tv comes on after about 3-5 minutes of it doing that and works. Would this be a case of the panel going out, a board issues, or the backlights?
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I think is more bad back lights.. to ensure this you must force backlights with no mainboard connected -
Will the backlights turn on without the mainboard connection? Or do i have to jump it to turn on?Comment
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Disconnecting main board from PSU works on Samsungs but not all LGS.
But yes likely backlights. Get a led tester for 15$ off Amazon and test them. Backlight repair isn't super easy if you are impatientComment
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Yes needs a jumper, post the image of the power board signals list near the output connector for the main board..Comment
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LG have LED BL protection circuit, if the issue at BL then was from start the protection take place.. but it sound its try to boot,, after 3-4Minutes started normal.
you need after it started normal , put the tV in Standby , then turn on again.. if it go straight on.. then the issue with Caps warming up. use yours hair dryer to warm up the PSU or MB to see which area the TV start direct when its cool .Comment
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Hello everybody! Posting this in hopes somebody has some expertise that leads to a clear path of troubleshooting that saves me a lot of time!
My macbook has the flex cable problem, the one that prevents the screen turning on. Ive been dealing with this for the last 3 years. Last year it went dead and I managed to fix it following youtube tutorials. But my fix wasnt the best, the problem returned a month later. This week, it went dead again. I again tried to fix it.
This time the original cable broke too close to the screen, it can't be fixed without tearing the screen... -
Hi guys
I'm trying to fix this laptop screen
Basically the owner is a computer shop and they brought it to me with two screens. They said the repair shop they use could not fix it, so I thought i would try to see if I am better than their current repairer!
OK so I have the original screen which works but has lines across the bottom quarter of the screen
I have the replacement screen, which they fitted and it worked. They then put the laptop on one side for a couple of weeks until they found a buyer. When they showed it to the buyer, the screen would... -
Hi all, I’ve got a problem I hope someone can help me fixi.
I have a Panasonic TX-48CX350B tv , it powers up ok but the screen is blank, the backlights are working, there’s nothing else though, no picture or sound. I’m not sure what the fault is called whether it’s BLANK/ BLACK/ or WHITE SCREEN I’ve actually came across this before on a similar tv but just ended up scrapping it, I will upload pictures of the boards etc , if anyone could help me I would really appreciate it...01-11-2025, 03:18 PM -
Just had a customer bring in a M2 MBA A2681 that had had a screen replacement in April at another repairer. Since then, she has been getting intermittent kernel panics. It's an aftermarket screen, and of course it fails in diagnostics as the calibration hasn't been done. The error in the panic log is "No device added after powering on the rails".
It seems the original repairer has swapped the board and the screen to other MAC's, and said that it isn't a screen issue. From what I understand, by doing a quick search on Google, this is in fact a screen issue. The panic relates...07-31-2025, 08:37 PM -
Hi,
I have a iphone XS that came in for a screen replacement, the screen was badly cracked, and inside missing scues, on the back of the screen still the blue protector, the screen was a LCD. So we replaced the screen and all good, installed the screen and we noticed that pressing the screen with a bit of force but not excessive, the phone dies. After plugging the charger it turns back on, but again if you press it it dies. I open the phone again, and I can't see anything major, with the phone open, if I press on the logic board, battery, charging board, or even putting pressure on...
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