Changing out the rest of those electrolytic caps is easy and might just solve it but you may have already fixed the powerboard with the work you have done.
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Last edited by nomoresonys; 05-11-2025, 07:24 PM. -
I hate to guess but I would say you have a backlight issue, probably one or more bad leds.Comment
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No I don't have a backlight tester. When the backlights come on they are all on. When I plug the PB back in the relay clicks, they come on bright then go dimmer then they go off, the relay clicks and it starts over.Comment
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Post a video of it on YouTube and give us the link here. It's hard to tell if you have a rebooting Samsung or you have an actual power board problem
Edit is the red link blinking 2x stops then blinks 2x and repeats?Last edited by EazyBone; 05-12-2025, 06:22 AM.Comment
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EasyBone, If you mean the Red power light at the bottom of the screen, it flashes once then starts the sequence over again.
Diah, I don't know what you mean without the screen.Comment
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I disconnected 1 ribbon cable at a time then both at once and they do the exact same thing as in Post #23.Comment
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Oh yes my bad. Mainboard is disconnected. Disregard what I said. I'm confusing myself. As Sony said PB or LEDs. Common it's LEDs on these tvs. Good luckComment
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Here is a link to a video as to what the tv is doing. Backlights flashing on and off.Comment
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disconnect the main boards from the power boards and turn it on... if the BL remain on... then you have issue at MB, but if the same BL on and off then Power boards or the LED BLComment
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Says the video is private. Can't open itComment
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I see it now. Yes can be PSU or LEDs as stated above. Led tester works great on LEDs.
Can also pull the PSU out of circuit and plug it in, test the voltages at the led connector.
My bet is it is the LEDs.Comment
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I just realized that video I posted was with the MB disconnected. This link here is with all boards connected.
https://youtube.com/shorts/Bqnl02fAh...4taZia97O6lkOZComment
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So much is going on here lol. Throw this thing away
Keep everything connected. Disconnect the ribbons from the main to the panel. What happens?
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Already did that. See post #28 and #23. Starting to look like a recycle project.Comment
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I literally just picked up this exact tv well I have the 710d model that has a TCON and it is flashing the LEDs on and off. Same PSU. Doing some testing but I'll get back when I figure some stuff out.
As a note all my LEDs test good and when I turn it on the LEDs flash on and off and relay repeatedly clicks.
I can't get voltages at the LEDs from the PSU. Looking like it's something with PSU, I'll do some testing over next couple days
As an additional note, no mosfets were blown on this board. The original owner said it flashed on and off. The picture shows up and flashes on and off. So I at least have pictureAttached FilesLast edited by EazyBone; 05-15-2025, 02:49 PM.Comment
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And out of pure luck I have a broken one that I may be able to repair. This one has those same mosfets you had blow. Let's see what happensAttached FilesComment
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I hope this is the right forum to post in despite not technically being a repair, but still a question of swapping boards.
I thought I'd explore the possibility to upgrade an existing working Samsung ue55nu7096u with the logic board (and power board if needed) of a newer model (ue55ru7105k) of the same size and appearance (and resolution). The reason being I'd like the extra inputs of that board including component in, an extra HDMI port and bluetooth. Its panel is broken so I have no use for the board otherwise.
The models launched in 2018 and 2019 respectively.... -
This specification for the Samsung Galaxy Book 2 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Galaxy Book 2 boardview and Galaxy Book 2 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...09-07-2024, 05:50 AM
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Hey everyone,
This power supply board is hard to find but there are repair kits available. This board had a blown fuse, FP801S, blown PFC MOSFET, QP802CS and ceramic cap, CP809. I replaced them with parts I already had and tested the rest of the parts that would've come in the repair kit and they were fine. I powered the board up on the bench expecting, in typical Samsung power supply board fashion, to see all my output voltages but, nothing. 0 volts on CNL801, CNM801 and CNT801. The only thing I have is 170vdc on the filter caps. No standby voltage either.
Anybody... -
Hi everyone,
Im looking for some advice regarding my Samsung UE55MU8000 TV with main board model BN94-11606C. The TV suddenly stopped turning on and now shows no signs of life at all not even the standby light at the bottom.
Initially, I suspected an issue with the PSU, so I took it to a repair center. They tested it and confirmed that the PSU works perfectly, even on other TVs. Based on that, I started investigating the main board.
I disconnected the main board from the PSU, and the backlight turned on, which seems to confirm the main board is the issue.... -
Samsung UN65KU6290F (May 2017); received from local Buy Nothing group. Was listed as "just went dead" and they wanted it gone. I brought it home, didn't notice anything visually wrong with the power supply board, looked up the cost of a new one and that's about as far as it went. Family was tired of tripping on the foot of the set so I decided to dig in and repair or toss.
Can't believe that I didn't check it earlier but I found the main 8 amp fuse blown. Jumped across it with a 10 amp blade style fuse and you can see that it literally exploded inside the second I plugged...
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