Cynosa V2 | Certain keys stop working at random

I recently bought this untouched Cynosa V2 from a pawn shop, came with absolutely everything, not a greasy lil fingerprint on it. I plugged it into my computer, it worked beautifully. For 5 minutes. Even now, certain keys stop working (n, alt, c, right arrow, backspace, space, could be more i havent found) Sometimes it just seemingly fixed itself, but now it's a deadend no matter what I do. I've deleted every USB driver, including the 2 Cynosa V2 drivers, I've deleted Synapse about 10 times now, I tried checking and messing with key rebinds, I've contacted customer support, I've unplugged, replugged into different ports, held Ctrl Caps Escape, I'm seriously running out of options and hair on my head. Please tell me someone solved this issue.