Xbox 360 Disc drive problem

Hi there reader,

So as of lately my Xbox 360 broke the laser didn’t work anymore but I did fix it I replaced it a month ago and it now works. As of now I wanted to boot up COD MW2 to play and my laser is now not reading it and it says open tray but only 3 weeks ago it was fine playing games. So I wanted to ask should I replace it again or change the voltage of the laser or fix my belt because I got a whole new disc drive and yes I paired with the original circuit board and disc drive board. So I’m confused as why am I having problems but only 3 weeks ago I was fine. If anyone can help me out please I would appreciate it.