Re: 55" Element tv turns on, no picture E4SJ5517BF
shit, the pictures stayed behind but it's post #16 with the pics.
shit, the pictures stayed behind but it's post #16 with the pics.
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Re: 55" Element tv turns on, no picture E4SJ5517BF
GotchaComment
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Re: 55" Element tv turns on, no picture E4SJ5517BF
Will check this afternoon after workComment
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Re: 55" Element tv turns on, no picture E4SJ5517BF
ok, also look at post #10, see all the little round copper looking spots by the connector where the ribbon cable plugs in, test those with tcon plugged in and hit power, see if you find any voltage on any of them.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?Comment
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Re: 55" Element tv turns on, no picture E4SJ5517BF
you do have 12 on the first one? if so follow out the trace to the next stop.Comment
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Re: 55" Element tv turns on, no picture E4SJ5517BF
so if you have 12 there you should have 12 on the fuse that would be the next stop.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 shortComment
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Re: 55" Element tv turns on, no picture E4SJ5517BF
for sure, does anyone know why the fuse would be short to ground?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 shortComment
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Re: 55" Element tv turns on, no picture E4SJ5517BF
ok, did you recheck the pads where the caps came off that you removed to see if the short is still there on the pads?Comment
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Re: 55" Element tv turns on, no picture E4SJ5517BF
Yes, the short is still thereComment
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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.Attached Filesif you find these attachements useful please consider making a small donation to the site
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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 fartherComment
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Re: 55" Element tv turns on, no picture E4SJ5517BF
I'm baffled too, seems like it would be fairly simple to find that short but it sure isn't.Comment
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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!!Comment
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Hi everyone,
Iām looking for help with a persistent issue on an LG TV model 55NANO77SRA, which uses the main board EBU66792103 (also used in LG UQ80 and NANO75/NANO80 series).
š§© Problem Summary:- The TV keeps scrolling through the menu or selecting items by itself.
- I removed the physical button board (the entire panel with power and volume buttons) and also disconnected the flat cable (CN202) from the main board.
- The remote control is not in use (batteries removed), and the TV still shows the same behavior.
- I
07-28-2025, 08:34 AM -
Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.
Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
Power Board Connector that goes to Main board
CN6401
Pin 01 NC
Pin 02 NC
Pin 03 "BL_ON": 0V
Pin 04 "N/C"
Pin 05 "STBY 3.3V": 3.5V
Pin 06 "GND": N/C
Pin 07 "AC_OFF"... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
I suppose the real question is whether the existing pinouts from ether a 17IPS71 psu are cross compatible with a 17IPS12 psu? If they are then the exchange of the main boards should have no issues providing the screen is compatible with both main boards. Obviously you can change the screen configurations easily enough (providing you have the correct files) for the main board. Why may you ask would I do this? Well a lot of the smart features are no longer working on a Hitachi 48HBT62U main board I wish to give it a new lease of life!
Obviously the same LVDS connector for the screen connection... -
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....
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