Has anyone else besides me ever had a problem with the lens caps falling off of the LED strips in a TV? I have an LG 50LB6000 that I repaired about mid summer. about 1/2 of the LED lens caps had fallen off causing white spots on the screen. So I glued them back on. I just had it come back for the same problem, but only worse. Most of them had fallen off, including the ones I had glued back on a few months ago. And the remaining ones still attached could be pulled off very easily. I had scraped the old glue off of the LED strips and back of the lens caps, and also cleaned both surfaces with alcohol. I used superglue gel which is what most people online recommend, and I used the good Locktite brand. I got the strips and lens caps all scraped clean of the old glue, and cleaned with alcohol again. By the way the back light brightness is set at less than 50%, the firmware is up to date, and there is not one single bad LED out of all 45 of them so I don't think they're overheating or running too hot. And I hate to replace the LED strips when every LED is still good. Before I glue them back on a second time, does anyone have any ideas on how I can prevent a repeat failure?
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Re: LED strip lens caps falling off
i use this glue on all my led jobs seems really good was recommended by another member https://www.ebay.co.uk/itm/Magic-Qui....c100506.m3226 -
Re: LED strip lens caps falling off
I use a 5 minute epoxy and use the smallest dot of it I can. The caps are still removable if need be.Comment
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Re: LED strip lens caps falling off
Ive noticed the same on the newer LG, they use a really big lens. I’m assuming they are too heavy for the fixing.
Pain when you’re trying to repair a led and they keep popping off around youComment
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Re: LED strip lens caps falling off
I also use 5-minute epoxy to affix the lenses. Super glue will outgas, which will deposit a white film on objects nearby.Comment
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Re: LED strip lens caps falling off
I bought some Gorilla Glue brand 5 minute clear epoxy Saturday and got them all re-attached. They seem to be holding well and I couldn't pull them off easily. Unfortunately I think they got a little fogged from the superglue because I can still see the individual spots of light on the screen. And even though I was very careful, probably due to this being the 3rd time the panel was disassembled, I ended up with a single very thin vertical line all the way down the screen just left of center. I reseated both ends of both ribbon cables along with the T-Con to main board cable and no luck. So I think I have a bad panel. But for future repairs, I'll use the epoxy right away to get it right the 1st time and not have to do multiple disassemblies of the panel. I'm sure that's stressful on the TFT glass and where the ribbons attach to both ends to fold them up and tape them to the glass for screen removal. I've done dozens of LED strip replacements the past couple years, and haven't broken a screen yet. And this is the 1st one I ever had go bad.Comment
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Re: LED strip lens caps falling off
I use dollar store crazy glue with zap zip kicker accelerant (available at hobby stores).Comment
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Soooo, I found someone giving away their 70" Vizio TV because it wouldn't turn on. Hoping it would be just some bad caps, I snapped it up. No dice. No bulging caps. TV would start consuming about 7W immediately after plugging it in, but no response from the remote or power button. Thermal showed the main chip on the mobo getting warm and nothing else. Power supply appeared to deliver stable 12V to the mainboard.
I ordered a replacement mobo(actually both mobo and PSU just to be sure) and popped it in. Picture! Sound! Endorphins! Then I noticed three long dark strips. Hmmm, had... -
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... -
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.
The other project however is a whole different deal. It's a Zoom 9000 guitar effect from the 90th that has developed a devil hound howl when there is no input from the guitar. I'm guessing caps problem. So, since I don't really use this effect anymore I thought it would be a perfect project to learn on.
I have studied the board and... -
I'm trying to repair two old VCRs, they both have bad caps. One has leaky ones, the other would barely run until I subbed in some caps from another power supply I had laying around (though they are the wrong values). This vcr works for an hour or two, but then the power supply starts whining and the picture gets lines in it. I didn't replace all the secondary caps, so another voltage might still be problematic, or the values I used are too far off.
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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