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Re: Samsung UE55MU6120K Boot loop with backlight no video
not sure, but probably retaining a lot more heat if it's snug against the wall, well was it sitting straight when running for 30 hours as in same position as on the wall.Comment
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Re: Samsung UE55MU6120K Boot loop with backlight no video
probably won't work but if it's still on the wall try a quick reset before you wrestle it back off the wall, unplug tv, hold power button for 30 seconds and try it, prolly no joy, then off the wall again.
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Re: Samsung UE55MU6120K Boot loop with backlight no video
already done unfortunately it doesn't work, i have to disassemble everything again
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Re: Samsung UE55MU6120K Boot loop with backlight no video
lmao...hate when that happens.
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Re: Samsung UE55MU6120K Boot loop with backlight no video
Don't waste time with thoughts of bad soldering joints and Macumbeiras... the problem reseats on the display and obviously without surgeries and with the eprom comparison equal you have a alternating defect maybe little heat related, maybe to gate COG , better to start the tespoint searching, clock lines, and prepare masking flats with tape..Comment
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Re: Samsung UE55MU6120K Boot loop with backlight no video
doubt it very much, can not recall a shorted panel ever not working then working for 30 hours.Comment
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Re: Samsung UE55MU6120K Boot loop with backlight no video
Evidently if you have forced TCon-Ready signal and something heated on the main board, the main goal is to locate the short circuit, actually it can also be on a small cap on mainbboard, thethermal cam helps, but also if you go to the supermarket you can ask the shop man for a piece of adhesive thermal paper for the fiscal record, if the heat comes from an inductor only on mb then better to search on the panel distribution boardsComment
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Re: Samsung UE55MU6120K Boot loop with backlight no video
Well you can replace the mainboard 47 times but it still won't fix it if the problem isn't the mainboard.
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Re: Samsung UE55MU6120K Boot loop with backlight no video
Actually it probably is the mainboard, well there's your proof, posted this after the above post, as in wrote this before your above post so didn't see that til after I posted.Last edited by nomoresonys; 03-11-2023, 02:02 PM.Comment
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Re: Samsung UE55MU6120K Boot loop with backlight no video
he seems to be the problem, probably some cracked welding since it now works after being heatedAttached FilesComment
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Re: Samsung UE55MU6120K Boot loop with backlight no video
so I wonder what exactly it could be, do any of those little mlc caps test short, maybe check those resistors too, what is that chip the ethernet switch?Last edited by nomoresonys; 03-11-2023, 01:25 PM.Comment
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Re: Samsung UE55MU6120K Boot loop with backlight no video
This is a DC / DC converter for powering the panel, there may be a problem in tying this converter with ceramic capacitors.Comment
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Samsung QLED QN50Q — purchased 2022 started experiencing a delay in the picture coming on in the morning less than 2 years later. Did not know the term boot loop at that time. As the loop delay ran into a few minutes did all the recommended troubleshooting, soft and hard reset, changing cables and outlet locations, no help. As the delay increased contacted Samsung tech group and allow them remote access the tv. Tech was moving too fast to see exactly what he was doing but this ultimately it was also no help. Lived with the delay until it stretched out over 6 hours. Pulled of off the back cover... -
Hi Team - just joined to see if anyone can offer some expertise in diagnosing an issue with a TV.
I've done a few hours googling and youtubing but just seeing if anyone has any insight here. I got a 55" Samsung UE55MU6470U which seems to boot loop and then after 10 mins will boot, work for a few minutes, then turn off and repeat.
Whilst it's on into the normal Samsung menu/boot screen it looks perfect - so I can't see there being any screen issues. I've seen lots of videos with taping across clock lines to diagnose which particular one may be an issue but i don't... -
Hello all... TV started boot looping. Opened the back panel and tried to isolate the problem. Just PSB no boot loop. PSB and MB no boot loop. Plug in the LVDS from panel to MB and boot looping starts up. It doesnt matter of order that I plug the LVDS ribbons back in, only 1 and no boot loop but as soon as 2nd one plugs in boot looping. I then noticed a flicker on the screen when I was closing the clip on the harness to the LVDS. Shut the lights off so I can see better, and I noticed as i slowly close it, I will get a picture, but as soon as it clips in, I lose picture and booting happens. So I... -
Hi, I rescued a Samsung UN40H5003AF (H = 2014 FHD) from the curb. Symptoms are: standby (red) light comes on, stays on for 8 seconds, flickers off, then comes back on, and the cycle continues.
Service manual: https://www.electronica-pt.com/esque...is-u8la-71272/
SMPS board: checked voltages, all seem normal (A13V = 12.8V, UD = 3.3V, PWM_BLU = 0.77V, PS_OnOff = 5.5V). Remove 10p cable to main board -> backlight comes on. I think this means SMPS board and backlight are good.
Main board: BN94-07592P / BN97-08922R... -
Hello,
My Samsung TV had a black patch on the left side of the screen for a while. One night it shut off and then became stuck in a boot loop. I initially believed the back-light was the issue and replaced the LEDs but it still boot loops. I've since replaced the main board and the issue persists.
With the main board unplugged, it powers on and the back-light comes on. I've tried the tape method but I gave up as I don't know what pins I need to cover.
I suspect the panel itself it broken but have no multi-meter to test. Is it worth investing in one to test?...
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