Storyteller12
Badcaps Veteran
Last Activity: Today, 10:23 PM
Joined: 06-12-2020
Location: Virginia
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The believe it’s just the tcon information you need. But since you got the other one working in service menu you can take pics of it and copy setting to new board -
You got the wrong board. You may be able to change the setting in service menu but need to know what your original setting/ tcon info wasLeave a comment:
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There is a winbond ic on the panel buffer board. Have you tried reprogramming that one?
Also you may want to post your original ic files here and see if Lotas can look at them and see if they’re good. If they are bad he can fix them. Sometimes downloaded ones from the net will not work. Doesn’t have the right info on them for your panel/ tconLeave a comment:
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Never heard of using hot glue around BGA chips. How does that help? Seems like it would cause more problems as the chip wouldn’t get any air flow and dissipate the heat. Which seems to be the reason these chips fail in the first place.
Seems like a proper reballing with lead solder would be enough...Leave a comment:
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Most likely the manufacturer. Some are made by Samsung, LG, AUO etc....Leave a comment:
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Sounds more like a software issue than a screen problem to me. Might be emmc going bad. Usually panel issues the tv won’t turn on or is in a constant reboot.Leave a comment:
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Unfortunately It’s trash. Needs a new panelLeave a comment:
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I have 3 of these TVs also with same problem. Just to note I had 1 working board and tried to swap ic from good board to bad one and it didn’t work.
After switching ic’s back to original boards the good board no longer worked and had same symptom.( no standby light and no power). So make sure if you order a new board you get the correct one.
keep us postedLeave a comment:
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There is only 2 TVs Samsung made with these edgelit panels on the side. The JS series you have and the HU series the year prior. Every other tv edgelit is lit from the bottom. You may get lucky but usually TVs this old all the diffusers are in bad shape some way or another. Will never be perfect again...Leave a comment:
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Cross reference shopjimmy.com for your tv mode # to ge the backlight part #. Then check eBay or Aliexpress. All backlights come from China. It is what it is. Just turn down the brightness and you should be good...Leave a comment:
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Never had one that wasn’t backlight related. You are right about them being sensitive to change though. These Sonys use a specific led that powers at 12v. Not the typical 3v or 6v led. When they start to fail they can draw a little too much current or just under 12v and cause the error...Leave a comment:
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It’s pretty much all of Samsungs edglit TVs on the lower end. There higher end use a different style led strip or use a bigger/ better heatsink for the leds.Leave a comment:
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In terms of troubleshooting you are correct and Sonys manual states that as well. Sony only tries that because the tech can change the boards. They never tear apart and replace backlights. They provide new panel with backlights and reinstall your old boards or replace tv altogether
However I have fixed a lot of these Sonys and never had ld board be bad. It’s always the backlights...Leave a comment:
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4 blink code is definitely backlights. I just fixed this same model with same symptom replacing backlightsLeave a comment:
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Replace backlights. That’s what the 4 blink code is. Nicks cheat is just a workaround and not a permanent fix anywaysLeave a comment:
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Anyone fix this issue before???
I have this Samsung QLED tv that works but has a vertical stripe. I know its most likely the cof chip but curious if anyone has successfully repaired one?...
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It’s definitely the main board. Test the caps in ohm mode around the big BGA chips. Which ever chip has the low ohms caps near is the problem.
you can try a reflow for testing but my experience with this model lg is you have to replace it. I’ve never got a reflow to work
you can buy the chips but they come from China so takes a while to get and need BGA workstation.
Mainboards are getting expensive and almost impossible to find for this model though and will just have the same fateLeave a comment:
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Jumpering is to determine which side of the lcd screen is bad. You don’t have the lcd screen in so this is not relevant to you at all.
unplug main board from power supply and leave the backlights connected to power supply. Plug tv in and if power supply and led lights are good they should light up.
if not double check you ordered correct leds. Then you can unplug led from power supply and read voltage output on the led pins. Report back all findings after performing these test.
also your pics never postedLeave a comment:
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Be careful with that. Most screens now have a coating for glare purposes and that will remove the coating making it worse. I know as I have tried.
sometimes you can use an eraser the the old pink square ones and lightly rub it. Sometimes it works but usually helps make it less noticeable if nothing else...Leave a comment:
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You can also use alcohol or flux to put on them and turn tv on and see which one gets hot and evaporatesLeave a comment:
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