Looking for info on older S3 miners

I picked up a couple of used S3s to mess around with some larger SHA256 ASICs, but the previous owner didn’t treat them well. The fans were set up all wrong. After testing, I found that in unit 1, I have a decent control board, one good hash board, and one bad hash board. In unit 2, there’s a bad controller but two good hash boards. I tried to combine these two partially working units into one functioning unit. I got it going, but after a few boots, the internal USB to UART section stopped working, so now it can’t detect the hash boards or fan signals. I tried it with all three working hash boards. I came across an old post from 2015 that talked about an adapter for the S3 hash board, but I can’t find any pics or schematics, and the site that hosted a lot of those images isn’t accessible anymore. I’m referencing this thread https://this forum.org/index.php?topic=671128.880 I’m hoping to find the circuit diagram or schematic, or even a clear photo if it’s a single layer board. If there’s another option, please share. I found some pinouts I think are for the S3 hash board from that thread. Can I use the old USB Block Erupters to connect to its USB to UART interface if that’s what that header is meant for? I’ve got three of those lying around. As it stands, my one and a half S3s are just taking up space. Sure, mining Bitcoin might not be profitable, but there are other SHA256 altcoins out there, and I’m doing this just for fun.

https://bitcointalk.org/index.php?topic=775662.0 What you could do is hook the boards via UART -> USB and try this way. There is also this github project that used similar way. Mighty Miner https://github.com/MightyDevices/mightyminer Was created for the S1 but I am sure there is possibility of this working on the S3 boards too. Hope this helps.

Both control boards will boot the custom OpenWRT and can load the Web interface but 1 the fans go full blast and the other not but doesn't see Hash boards or the RPMs on the Fans but the fans turn off waiting for the turn on command I am guessing. The first link I am guessing forces the thing to do a factory image reset The second link being mainly javascript which I guess replaces the web panel