This was given to me need to see what you think
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Re: TH-42PX50U weird screen
Most likely D board but I have seen the A board show a slightly similar problem. I have no testing procedure, just past examples. Some one else may have something to say....I suppose you could test the regulators on the D and A.
In this case, I am using "A" board as main assembly, I believe yours to have like 4 boards that consist of the main; correct me if I am wrong but: DG, DT, DV, and H...possibly Z (but that is not related to your issue)Last edited by drpj23; 10-15-2012, 12:01 AM. -
Re: TH-42PX50U weird screen
ok, i have tools and meters and familiar with them, how do i go about testing those ? would love to have this hanging in my bedroom if i can get it working.Comment
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Re: TH-42PX50U weird screen
Well first make sure the power supply is outputting the correct voltages (with respect to the legends printed beside the connectors) and look for obviously blown components.
Then look at the D board and find the transistors on that board and measure the voltage out of each pin and you can post the results with the readings referenced to the part name.
So
U11 - 7805
Pin 1: 12.05v
Pin 2: 0.12v
Pin 3: 5.01V
for example.
But it can also be done to the IC's not working correctly, no way to test that without a scope and guide.Comment
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Re: TH-42PX50U weird screen
ok will do, as soon as i can get some time in the next day or two ill pull the cover off the back and start, just wanted to make sure no one had seen this before and it was cut and dry replace this board, etc.Comment
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Re: TH-42PX50U weird screen
Ok, it would probably be good too to include pictures via the attachments feature under advanced reply.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... -
Hey everyone.
I have a 820-3787-06 board from a MBP A1398 which has a screen issue. The problem starts with a bit of noise just like old TVs when booting and when the OS is on, screen jumps are added to the little noise on the screen. The jumps are millisecond and go back to the original place.
Since there's a little crack in the corner of the screen, I thought it has to be the display. But to my surprise it wasn't since I tried it with a fully functioning screen.
The same issue isn't happening with an external display. I did a gpu/cpu stress test on external...02-07-2024, 05:56 AM -
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... -
Hello everyone, I’ve just been given a Samsung UE55JU6800K smart tv as it had white spots on the screen due to the led lenses falling off. After refitting them & putting the tv back together I thought it was a nice easy fix for a free bedroom tv , then I tried it before screwing the back into place. I realised that the right side of the screen was darker than the other side, I removed the screen again as I thought the backlights had failed but they are fine.
I put the screen back in place & turned it back on . The screen seemed to be ok again but different screens on the same... -
Picked this up to resurrect.
When I plugged it in it comes on for about 1 minute... after a minute the screen blacks out and I gets blinking red lights on the power button.
I read that a common issue with this model is a failed BGA so I ordered a replacement on eBay.
Sometimes the TV would produce an expanding blob on the screen before going black.
See Video here
I ordered a replacement board off of eBay and installed it tonight and got the same behavior.
Did I get another defective board or is there an issue with...
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