is it my ps2 laser or my messiah 2 chip??

[Camui]

Everything Non dvd work perfectly, until i put in something thats a dvd, thats original or imports or dvd movies. Dvd movies just freeze after it plays, original and imports have these patchy green blocks when playing fmv's and when it tries to load the game, it'll just freeze. when i deactivate the messiah, same problem persists, i speculate its my dvd reader, but i just want to get other ppl's inputs. if it is my laser, any suggestions on how to fix this (besides the most obvious, clean the lense with cd cleaner).