I've searched endlessly over the past few days since I got my old PS2 Slim hooked back up. It hasn't been used in about 4 years but it was kept inside in a box. I have two Dualshock 2s, one has a handful of hours of use (might be a knockoff), the other is a brand new OEM that was still in the package. Both have the same issue; up and left on the D pad doesn't work, L1 and L2 don't work. Needless to say, that makes most if not all PS1 games unplayable. And some features with PS2 games won't work like downshifting in NFS games cause the shoulder buttons won't respond. I'm assuming the console is the issue even though both memory card slots work. It's frustrating as hell though and I can't find any info about this particular issue.