I've just installed a Mayumi V4 into my PSOne and now i'm having some issues when trying to test it out. I've reassembled the console and when I turn it on, the drive spins, but the laser itself is either rattling back and forth or trying to constantly move to the left, making a rapid clicking noise. I'm curious to know whether or not something to do with a component of the mod chip itself, or if something is just off on the drive. My mod work looks fine but I may have messed up with one of the solder points?
Video of the issue (warning terrible noise): https://vid.me/6Khy
Photos of the mod (click to enlarge):
Diagram:
