This is mostly OK, in that the back light works and can stay on for a good few hours but on some occasions the back light will turn off, I understand this is a common fault but not too sure on where to start looking, as I say it is fine mostly but needs to be 100% so if you can help in diagnosing as to what this is, it would be greatly received, thanks.
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Re: Samsung LE40R73 backlight issue.
Start by checking the BL ON/OFF signal going to the power board from the main board.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: Samsung LE40R73 backlight issue.
Thanks Tom66, it seems it might be this:
http://www.youtube.com/watch?v=XdsDxKkcesg, that's the exact same power supply I have, I shall give it a closer inspection later.Comment
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Re: Samsung LE40R73 backlight issue.
Upon looking I had the exact same issue, so a quick dab of solder and all seems fine now.Comment
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Re: Samsung LE40R73 backlight issue.
That is a great fix!! Can you post the Power supply board number - may help others in future.Please 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 LE40R73 backlight issue.
Yes, that looks likely, thanks.
I also notice there are a lot of repair kits available for it - suggesting the caps
are not too good - did you replace yours?Please 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 LE40R73 backlight issue.
The caps looked perfectly fine with the Tv starting up after 4 flashes, all perfectly usual from my experience so no need to change.Comment
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Re: Samsung LE40R73 backlight issue.
Just picked up a LNS4051DX-XAA with the same BN44-00134A power supply. The caps had all been replaced in the last year but it wasn't working again. I found the same bad solder joint on the backside. A touch up on that cold joint and the set is working like new again.Comment
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Re: Samsung LE40R73 backlight issue.
An old post but just goes to show how helpful it is when you follow up and inform us of your repair.
Thanks to this thread I've just repaired an identical fault with the backlights on an LE40R73BD. The transformer solder joints looked fine but decided to add fresh solder and the set has now been running for the last 4hrs, not 15-20 minutes.Willing to help but I'm no expert.Comment
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Re: Samsung LE40R73 backlight issue.
Had same issue, transformer broke through the soldered rivet. Resoldering fixed the issue.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/Comment
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Re: Samsung LE40R73 backlight issue.
Just had one come my way was recap a year or so ago found this post and tip for joints in transformer TI801 cheers folksComment
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Hello All!
So here is the issue I am having. When everything is plugged in as normal, the TV turns on and I get a quick flash of the backlight. After that the backlight never turns back on but the rest of the TV works fine. If I pull the PWM pin from the cable between the main board and power board the backlight turns on and the tv works "normally". If it is plugged in I get nothing. I did do a factory reset but that didn't solve my issue. When everything is plugged in normally I get .6v at start up and continues rise over about 10 seconds. (~.6v then ~.8v then ~1.8v... -
Hello Team,
I'm back with another backlight issue that I thought was simple, but it turned out to be more complex than expected.
Let me provide a brief history: The TV was working well, then one day, the backlight started and shut down. I thought I had an LED issue leading to this behavior, so I replaced the LEDs with brand new ones. However, the issue remains the same.
Next, I replaced the electrolytic capacitors attached to the LED power supply, but the results were the same. I then replaced the driver, a OB3365RP, and did it twice due to the same result.... -
Hi All,
I have a Samsung Un65eh6000 with a backlight issue.
The original issue was backlight current was present but led strips did not light
I tested the backlights and all tested to be working properly.
I assumed then that the power supply was not sending current to the led strips.
Power supply board part number BN44-00560A.
After checking voltages it appears that current output at connector CNL802 was outputting the correct current 189 VDC on pins 1,2,6, and 8.
The issue then was there was no ground on the connector... -
Hi all,
Because of two bright spots and a couple of dark spots I decided to replace the backlights in my Samsung UE48JU7000. See attached photos:
I thought all went well, but after full assembly and testing it out it turns out not all is fine. The backlights are completely fine but I have some weird issues on the right half of the screen. Since I didn't really touch the T-CON board (apart from taking out the ribbons of the display and reconnecting them on assembly) it would be weird that the issue is with the T-CON board... But based on the behavior of the service... -
Hello, got an iPad Pro A2378 12.9 5th gen with no backlight. Got another test unit without screen, tested the screen, still no backlight with the test unit.
Figured out the backlight on the screen was bad, ordred a new backlight from mobilesentrix, *carefully replaced it* without damaging the lcd, oh well.
Final result, issue is still there, the screen has no back lights. So i'm back to square one, with 3 hours less and 100$ out, issue still on the screen.
The panel is still ok, i can see the apple in the middle of the screen when it kicks in, just no backlight.
Anyone...
Comment