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Re: Samsung 305T Plus black screen
What about those yellow caps on the inverter have they been changed yetPlease upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Samsung 305T Plus black screen
Nothing is changed and I can't do anything about it
. I have to belive that we have good caps. From what I read there are alot of posible problems. A transformer or bad CCFL lamp can activate the protection on the inverter board and the backlight will stay off untill you remove them from circuit. I will let him try to fix the problem a few more days. If I have a bad CCFL lamp he can't do anything 
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Re: Samsung 305T Plus black screen
Can somebody tell me from where is sent the "on command" to inverter.Nothing is changed and I can't do anything about it. I have to belive that we have good caps. From what I read there are alot of posible problems. A transformer or bad CCFL lamp can activate the protection on the inverter board and the backlight will stay off untill you remove them from circuit. I will let him try to fix the problem a few more days. If I have a bad CCFL lamp he can't do anything .
He thinks that this could be the problem.
Reminder: backlit is missing, two blown fuses, at least one mosfet...and now a possible "on command" problem. Need advice fast...make sense what he said? Should I find another service before is to late?
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Re: Samsung 305T Plus black screen
Back to the drawing board. After two weeks I managed to take all the components back
. The short is gone, the fuses are good...but we have no backlit. Waiting for the next step 
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Re: Samsung 305T Plus black screen
OK. You can close this thread. Seams that people are not as friendly as I thought. I find it hard to believe that nobody has a clue about step-by-step troubleshooting.Comment
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Re: Samsung 305T Plus black screen
I'm back with another question if somebody want to help me. I did everything that was told and seams that i'm moving in the right direction.
From mainboard:
BL_EN = 2.7V
Status = 3.3V
all 24V lines are ok.
Problem I found: The inverter IC (BD9886FV) has no input voltage (pin 28).
Look at this pictures for an obvious bad capacitor or maybe you have a clue from where should I start tracking the problem. Thank you.
Attached FilesComment
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Re: Samsung 305T Plus black screen
I have a black screen with backlight on was kines befotr 375 @7 min in oven but put back together and backlight and power button onlyComment
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Re: Samsung 305T Plus black screen
With lines but selftest worked flashing colorsComment
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I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.
I ordered a supposedly ‘new' Tcon board this time, and... -
Hello,
YouTube video of the problem encountered: https://youtube.com/shorts/q7TLNv36LUo
I am a pro and I have a problem that I have never seen despite my 7.5 years of experience on my own and my thousands of repairs, on a customer's Dell G3 15 3500.
On this PC I have already changed the complete palmrest because the keyboard was no longer working properly.
I also changed the screen because the PC fell and the screen was broken.
I changed the battery with a new and original battery.
I also had corrosion/oxidation on the... -
Hey folks,
I picked this neat monitor up from a recycling center years ago, and it worked fine for a long time. I know they are prone to T-con issues with the Altera chip, but I've yet to experience any symptoms of that going. I always perform scaling on the GPU though. It had occasionally thrown a black screen at me, that was usually reset by powering it off, and reseating the DVI-D cable in the sole input. I gave it to my brother who said the problem got worse, and it would be very difficult to get it to display a picture, it took lots of fiddling. As far as I understand him, it always... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
Hello,
I have my TV model UE50KU6070 which I am trying to repair.
BN41-02528A / BN94-10800C motherboard.
If I disconnect the motherboard from the power board, the backlight works. When the motherboard is connected the backlight works but the screen remains black.
When I plug the TV into the electrical outlet, the standby LED lights up but no reaction to an attempt to start it with the remote control for about 1 minute. During this minute the TV consumes about 20W.
After one minute the consumption drops to 0W and the TV can turn on with the remote control but...
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