Picked up a LED video screen in a horrible facebook deal. Long story I will tell at SELEM or something.
Anyways, the panels were left in flight cases outside for 4 months due to a landlord dispute. At first things seemed ooookay other than the mildew smell and some rust on some things (Specifically certain screws and parts.)
Turns out I guess the moisture penetrates the SMD LEDs and damages the junctions. This may lead to it causing issues in illuminating all the time when the array is scanned? So I get a bunch of sets of 4/5 LEDs that stay on.
I have 24 panels, each 30" x 42" (large!!). Each is made up of 8 modules with 40 x 40 LEDs. The module is all one, and partially transparent as the PCB has cuts in it between LED rows. Looks sexy but makes service harder.
Each module has around 210 precision phillips screws, so that's 1680 or so per frame. BUT, one of the things that rusted the most was some of these screws. And I need to remove the plastics to replace LEDs.
Looking around, I found powered screwdrivers for precision bits and all that, so that exists. I can put it back together with half as many screws or less. I figure I can hit them all with oil and maybe clean them up a bit -- as long as the + is still there the screws usually come out but a few are worse. I can drill those.
I was thinking of maybe getting some SMALL tslot and wheels and it could be possible make a jig for LED replacement, and for soldering down them with accuracy.
All together, if I could get 20 of 24 panels working it would yield 25' wide by 7.5' tall, or 15' wide by 10.5' tall. 16 panels is still like 20' wide by 7.5' high!!! Pretttty sexy! But they are heavy, and with 8 in a case the cases are so heavy it's impossible to lift. They are set to stack but you would need 4 really muscular people to unstack I think.
I love LED walls and it's awesome that the frames interlock, I even have 5 of the hangbars (really could use 8 of them total.)
Unfortunately the system was made by a company in China and they are out of biz, so the odds of getting replacement modules is left to surplus market and they're not as common as the ones you see from Aliexpress (that I built my P10 display from.) Control system is Novastar receiver cards, and I bought a sender so that has been dealt with mostly.
Some pics of it in action. You can see the LEDs stuck on when it's black. There are others that are out, that is easier to deal with though.
https://imgur.com/a/C8jAR7i