Hello,I buy today BIG 
LG 47SL8500 ,and problem is
tv turn on on 5-6 seconds and turn off.
I will upload pictures soon
LG 47SL8500 ,and problem istv turn on on 5-6 seconds and turn off.
I will upload pictures soon
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Re: LG 47SL8500 bad caps?
uploading picturesAttached Files -
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Re: LG 47SL8500 bad caps?
Could be Inverter or Backlights issue, I am guessing. You would have to measure some voltages for us to diagnose better.Comment
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Re: LG 47SL8500 bad caps?
ok I hear some sound on Master inverter board when I turn on tv.
sound like Welding
Attached FilesComment
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Re: LG 47SL8500 bad caps?
when I disconnect MASTER and SLAVE inverter boards still turning off tv ,voltages are ok . hmmComment
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Re: LG 47SL8500 bad caps?
I suspect on NAND flash chip,had this problem with samsung TV turning off
after Smart logoLast edited by chrle; 05-06-2017, 12:36 PM.Comment
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Re: LG 47SL8500 bad caps?
there are a few threads where these inverters have failed the noise you are hearing maybe is the winding shorting out on that transformer dissconecting them may not prove nothing as the set will detect a error as there not connectedComment
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Re: LG 47SL8500 bad caps?
I observed that the Primary side of the Inverter transformers soldering looks disturbed. My gut feeling is that one of these transforms, if not both, are the culprits. Take resistance readings across the pins of each transformer and compare if they match.Comment
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Re: LG 47SL8500 bad caps?
I have same resistance readings from Master and Slave inverter boards.
tranformers are L2-CF47SSLast edited by chrle; 05-07-2017, 02:47 AM.Comment
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Re: LG 47SL8500 bad caps?
I am looking for transformers to buy ,but I cant find it.Comment
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Re: LG 47SL8500 bad caps?
Have you refreshed all the solder joints around those transformers?Comment
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Re: LG 47SL8500 bad caps?
All these LG infinia tv's ( 8500 series ) have bad mainboards. You won't find a replacement unit cheap because its a common problem for these sets. Cheapest will be around 250/300 USD.
The problem is bad BGA solder under the cpu , reflow the cpu and you will see it stays on for a longer while. Do NOT bake the mainboard in the oven , there are also small components on the bottom of these boards that will fall off.
These sets also have bad HDMI chips.I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!
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Re: LG 47SL8500 bad caps?
All these LG infinia tv's ( 8500 series ) have bad mainboards. You won't find a replacement unit cheap because its a common problem for these sets. Cheapest will be around 250/300 USD.
The problem is bad BGA solder under the cpu , reflow the cpu and you will see it stays on for a longer while. Do NOT bake the mainboard in the oven , there are also small components on the bottom of these boards that will fall off.
These sets also have bad HDMI chips.I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
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Re: LG 47SL8500 bad caps?
ok I found complete master/slave inverter boards,main board,power board and t-con board for 35 euro in my country,I will post results when boards come
I think that is problem with transformer on inverter master board,will post tranformer sound video..Comment
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Re: LG 47SL8500 bad caps?
Think you have mouse in your panel. If you turn off lights and try do you see any arcing or smell ozone?I assume no responsibility for any stupid suggestions I might post.Comment
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Re: LG 47SL8500 bad caps?
It sounds and looks the arcing in the panel. Try looking at it again in the dark room.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: LG 47SL8500 bad caps?
sound is going from transformer on master invertor board,and smell.Comment
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I know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.
For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).
https://www.badcaps.net/filedata/fetch?id=3591771
https://www.badcaps.net/filedata/fetch?id=3591772
It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:
https://www.badcaps.net/filedata/fetch?id=359177... -
Normally, I never post repairs this quick after I do them, because… I am usually very slow. But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though.
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
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Hello,
First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.
I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.
I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
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Hello!
I have two projects on my work bench. One is a friends dead JBL Xtreme speaker with a blown voltage regulator and corresponding bulged and shorted cap. That cap has clear markings so I know what replacement I need for it.
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I have studied the board and... -
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I've been on mouser and digikey but the options are a bit overwhelming. I just need some new ones that will work. They don't need to be top quality,...
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