Re: 55" Element tv turns on, no picture E4SJ5517BF
Probably one of the chips is shorted out. I might attempt to replace one at some point but I'm gonna hang it up for now. I do appreciate all the help though!!
Jerdejong
Member
Last Activity: 07-15-2022, 11:10 AM
Joined: 04-18-2022
Location: ALLENDALE
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Re: 55" Element tv turns on, no picture E4SJ5517BF
I think I'm done unless someone wants to come tackle this. I removed the rest of the caps that looked like they were traced back to the fuse. Still getting a short to ground(now about 80ohms). The only traces that look like they're connected to fuse, lead to the 2 chips. I think this is out of my expertise to go any fartherLeave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
Ok so I discovered vias which are small holes connecting the front and back of the circuit board. In the pic, the far right red circle is where the fuse leads to, in turn, feeding the blue circles on the left. I'll do a little more desoldering and see what I come up with....Leave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
Yes, the short is still thereLeave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
I'll post a pic of the back side of the board when I get home. I have a hunch of the general area that is causing the shortLeave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
I did have 12v at the fuse, when the tv would power on. Now that it won't power on, I can't test at the fuse. However, with that cable unplugged, I'm still able to test for 12v coming from the main board, which I do have. I just need to find that stinkin shortLeave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
If you look at post #7, 1st picture... there's a legend for those copper test points. I only see one of those points that should read 12v. Are there more points that should have 12v, even if they're not labeled 12v?Leave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
Will check this afternoon after workLeave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
GotchaLeave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
Ok thanks I'll do some more poking around. First I have to find that short, so the tv will power on with the ribbon cable plugged in.Leave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
I also have to add that sometimes when checking some caps, the reading would continuously beep on one side, then give a short beep on the other side, but with a low ohm reading...around 100 or just above. Since the components are in circuit, I'm guessing I can't get accurate resultsLeave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
Yes I pretty much checked every component for a short to ground. I think there was another group of caps acting the same way as the caps by the fuse...one side would read close to 0 ohms and the other would read around 150. I'll check them again tonight. In post #19, dskall sent a link to a schematic which was close to mine but not exact. If he couldn't find the exact one for my board, I probably wouldn't have any luck.Leave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
These 6 little holes seem like they might be connected to the other side of the board, in which I could follow that trace. Not sure how it makes the connection without any components going through the board....Leave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
Well I desoldered the 2 caps next to the fuse. I still get continuous beeping on both sides of the fuse, when checking to ground, and a reading of 122 ohms. Must be another component farther down the line that's shorted.Leave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
I'll work on those caps in the next couple days and report backLeave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
The fuse reads 0 in diode mode, even with the leads switchedLeave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
When I say dead short, I mean my volt meter beeps continuously and the ohms jump all over the placeLeave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
Ok so I powered on the tv, with the ribbon cable unplugged. I'm getting 12v at the proper pins on the cable. Also, with the ribbon cable unplugged, I'm seeing weird readings on this fuse and the 2 caps next to it. I'm getting a dead short to ground on both sides of the caps and fuse. I'll probably desolder the caps first and see what happens....Leave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
Ok yes I should be able to check for 12v coming from the main board, as long as I leave the ribbon cable unplugged. Will check when I get home from work tonightLeave a comment:
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Re: 55" Element tv turns on, no picture E4SJ5517BF
That's without jumping the power supplyLeave a comment:
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