Hi, I was wondering if you guys could help me mod my original PlayStation to play US and Japanese games (I’m in a PAL region). I ordered an MM3 mod chip and planned to install it into my SCPH-9002 model system. Upon opening the system, I found it had actually already been modded.Here is a picture of the chip that had already been installed. I can’t find any reference to the points they’ve soldered to online: all the ones I’ve seen use all eight pins and span the whole board as I’ll go into later on in the post. Proceeding this knowledge I put the system back together and booted up Final Fantasy Tactics in the hope that it would work. I never thought to try it at first as I presumed it wouldn’t have already been modded. The game booted and I thought I was in the clear, though upon watching the opening cutscene and starting the game, it got stuck on the loading screen. I tried a couple of other games (PAL region ones that didn’t need the mod chip to work) and some of them were getting stuck loading levels, too. All the disks I tried were in great condition so I presumed it couldn’t have been the disk at fault and thought that I’d maybe not put the system back together right after opening it up. However when I opened it back up to inspect it Everything seemed to be in order. I then swapped the disk drive out from another spare PlayStation so see if maybe I’d accidentally damaged the laser or something taking it apart, but the problem with the game persisted. I then out the original disk drive back in, cleaned the laser with 99% rubbing alchohol and then tested again for good measure. The other games now seemed to work flawlessly, the PAL ones, but the NTSC Final Fantasy Tactics was still getting stuck on the same spot - right when the opening cutscene had finished. I decided it might be the mod chip that had been installed by the previous owner, so I de-soldered it and attempted to install my chip that I bought using this diagram: https://quade.co/ps1-modchip-guide/mm3/pu-23/ Just booted the system up now with the new chip installed, and now the disk drive isn’t spinning up at all when a disk is in. Pressing the little button that is pressed down by the lid doesn’t momentarily turn the spindle and move the laser back and forth as it usually does in a working system; but turns the spindle quickly and continuously with no movement of the laser. My guess is that one of the points I’ve soldered to is causing the drive to malfunction. I have to say, the installation didn’t go that great. It certainly wasn’t a “neat” job, and I was concerned when putting the shield back on that the wires on the chip were going to come in contact with each other and that the other points on the board were going to come in contact with the chip. The solder points were so tiny and fiddly it was a real challenge to do it, and even more so considering I didn’t have a magnifying glass or helping hands. I am certain I was able to solder onto every point without touching others, despite the difficulty; but whether or not with everything out back together the chip is coming into contact with points it shouldn’t is a different question. The points and chip are so tiny I just don’t know to isolate them with tape as I ordinarily would. I’m no soldering expert, either, and though I’ve modded other consoles this particular installation was challenging to say the least, and now I don’t know what the hell is happening with the disk drive or whether the chip is even properly installed or not. I’ve been reading some other posts on here and you guys seem to really know what you’re doing. So what should I do next? I’m going to have to trouble shoot this but I dont know where to start, and even if I get the drive working I’d be surprised if the compression on the chip and wires isn’t causing the thing to short somewhere and not work. It’s likely I’ll need to re-install it which is something else I’ll likely need help with. Any ideas? Many thanks!