EazyBone
Badcaps Legend
Last Activity: Yesterday, 05:40 PM
Joined: 06-23-2023
Location: USA
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I've bought from them, never had a problem. -
Backlights can be funky. I get tvs with BLs out from customers, turn on and they work. Even for 2-3 days and test fine. Doesn't always rule them out. They eventually go out again and I can then make them test bad. Just throwing that out there before you decide they are just good.
Pictures of PSU/connectors would help alsoLeave a comment:
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You probably tried this already.. but ive fixed this before doing a factory reset and an update. May not help but you never knowLeave a comment:
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Surge protector won't ever protect from a lightning strike just fyi. 6.21 gigawatts of energy ain't gonna be stopped by a tiny surge protector. (Thanks back to the future)...Leave a comment:
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What about this.
[url]https://a.aliexpress.com/_mL9tduL[/url]https://What about this.<br /> <br /..._mL9tduL[/url]Leave a comment:
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Ah okay, then it's possible to suspect the main also. Do you have both main boards? Do they both do the same thing? What's the EBT numbers on both
Tape trick will not always show a panel short, but it's semi reliable.Leave a comment:
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Lookup fixing TV with tape. See if you can get a picture that way.
But also try to disconnect one of the ribbons on the buffer boards that is orange/transparent at a time also. See if that does anything first.
Its no unheard of to get a bad main board, but if both boards have sound and no picture I would start checking the panelLeave a comment:
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Upload a video of it going out. But sounds like a panel issue if you already replaced the main board and TCON and it doing the same thing....Leave a comment:
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Yea, I do have working one. I don't know where the IC is, definitely something I can test if pointed in the direction...Leave a comment:
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Is that connected to lights or on bench...Leave a comment:
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So when plugged into the tv, those same spots read 190v ground chassis on good board. And fluctuates voltages when plugged in on bad board. No idea what that means. I'm not able to help ya any further if no one else can point me in a direction. I can't learn if I don't know what to look up or how to find it and I've searched pretty through for a solution. Sorry
But at least we have same problem and it seems like it's the power board for you.
When I keep all ribbons connected to the Tv and only disconnect the PSU from the LEDs (with the bad board) I still was able to...Leave a comment:
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So the only discrepancy I have found so far is.
When I check the voltage on pins 10 and 11 on the bad board I get 1.8 volts. When I check it on the good board against 0.005 volts or nothing.
So far the other voltages to the LEDs seem correct except for these two pins. I'm kind of just probing around maybe you can check what you get on 10 and 11 using the chassis ground and check the voltage on that jp949 hole the probe is in in the picture. Seems these are connected
I'm doing the tests with the PSU out of the TV as a standalone.
Also I am tracing...Last edited by EazyBone; 05-16-2025, 03:04 PM.Leave a comment:
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So I figured out the old bad board. Original what blew was the other mosfets up top in the picture. The main caps were shorted because those mosfets were shorted. Replaced and tv fires right up. Now that I have a working good board, maybe we can help the OP and me figure out the old board with the blinking leds. I'd assume it's probably a similar issue?
What can I do with good board to help test the led areas for us both?
Edit. I call everything that looks like that a mosfet lol don't know if that's true....Leave a comment:
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I can't get the old spare board to stop popping. Not sure what's wrong. But I have compared the cold side leds parts, and something is off on the board that's flashing. No idea what. The mosfets on the flashing one read 3megaohms and climbs to 50m ohms
The mosfets on the, probably good but popping board reads 4.6mohms steady (led cold side)...Leave a 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 happens...
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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...Last edited by EazyBone; 05-15-2025, 02:49 PM.Leave a comment:
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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?...Leave a comment:
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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....Leave a comment:
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Says the video is private. Can't open itLeave a 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 luckLeave a comment:
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