I've recently soldered a DMS4 Pro mod chip to my v15 slim PS2. After soldering all the wires the chip was recognized upon boot up and I was able to flash it with the latest Toxic OS 0.41. I was able to load a regular PS2 game no problem so I then tried my burned games and had more trouble. The burned games worked intermittently - I played 1 burned game for almost an hour before it froze. Then when I would boot I kept getting the 'can't read disc' error. I tried cleaning the lens several times and it worked once, but doesn't help anymore. Now I can't even get it to try and read the disc. I get the 'there is no data' from the PS2 browser feature. If I boot right into Toxic OS and then try to load the game it says 'there is no disk!'. I know there have been many problems with the slim PS2 lasers so I bought an entirely new tray and laser. Once installed I got the same exact problem - 'there is no data'. It worked intermittently and now will not work at all. I've cleaned the laser and replaced the laser and still no luck. I'm desperate for any help anyone can offer. What should I check next I've already used a multimeter to check the connections from the mod chip and to ensure that nothing is shorted out. Please anyone who has an idea for what I can test/replace next to try and get this thing to work I would greatly appreciate it. Here are my specs: Version: Slim PS2 v15 Model Number: SCPH-7701a Board Number: GH-051-12 Mod-Chip: DMS4 Pro Bios: Toxic OS 0.41 Thank you in advance to anyone who can offer any help.