i fitted a messiah to my 30003r pal v5 ps2,it did'nt work just a black screen,so i uninstalled it leaving only scex,reset,3.3v and ground connected to test the chip and still had the same problem,now i have removed it completely and get it to boot to the browser but it says no data when i put in a disc,i'm guessing it can't read the cdrom i've put all the ribbons back and there are no noticable points of damage to the board.any ideas what it may be..