My ps2 is having problems lately reading ps1 backups and ps2 dvds or any dvd. It reads ps2 cds and original ps1 games perfectly. When it tries to read a ps1 backup it always says to insert a valid ps1 or ps2 disk and when it is reading a dvd it makes these weird low grinding noises. I have a duo2 second edition modchip installed and my ps2 is a v4. It was reading everything fine for about a month until it started doing these things this week. I have tried adjusting the laser, and cleaning it and when i put it back together i was so stupid, i accidently squished the wiring for the fan and now the fan doesn't work, so i have been using like a large fan to cool off my ps2. Thanks to anyone to helps.