1117 is the generic I/O error.
Could be your SD reader(s), the mod or the eMMC chip itself.
Do the different PCs you tried it on also have different SD readers? If so your solder work might be suboptimal.
It's the SD card lock switch, that's what it was for me. When it rips off, it stays permanently in the locked position. From my understanding the card reader has a piece in it that gets pressed down by the little piece of plastic when it's in the unlocked position. When this piece gets pressed down, it allows you to write. Since your little plastic lock piece is probably ripped off (this was the issue in my case), the little piece in the card reader does not get pressed, and therefore the computer doesn't allow you to write to the SD card. There are multiple fixes online, but the best one is to put a piece of tape over the hole. Make sure its a pretty solid piece of tape though and if it isn't solid, shove anything (plastic, wood, whatever) in the slot before you put the tape on. The first time I tried, it didn't work because my tape wasn't strong enough, but then i jammed the hole with a bunch of plastic and put the tape over that and then it worked. Hope this helps.