I've just purchased and installed the Matrix Infinity v1.99 mod chip in my Playstation 2 (US Version 4, thick model). This particular machine is in excellent condition, with low hours (I bought it new), and plays all game (and DVD movies) fine. So, I installed the chip, and soldered all the required wires, following the provided diagrams at the seller's site My chip doesn't match the one in the picture in the diagram - mine is white. But, the wiring points all have the same letters. Also, oddly enough, the diagram doesn't show where to hook up the G or H wires, Anyway, after installing the chip and reassembling the PS2, I popped in an original PS2 DVD game, and it played it fine. I tried a backup PSX game CD, and that worked fine as well. But, when I put in a backup PS2 DVD, I get nothing, just a red screen instructing me to use a PSX or PS2 game. I also have read that the Matrix Infinity has a configuration utility - I have been unable to access this (holding down Triangle and Circle at poweron). So... any advice? I've been over my wiring carefully, and can't find any faults. And since it plays PSX games, at least something is working. It's not the drive, because I can still play all original games. I can also still play DVD's, as well as burned DVD movies (single and dual layer). Any advice would be greatly appreciated. Thanks!