3DO tech help

has ne1 experienced this or have an idea of what it is?

a 3do i just got works like crap-- my main concern (besides the loud cranking and knocking noises ) is that the sound dosent work right -- most of the time i put in a game and i hear nothing or pops and sometimes the sound will appear and disapear-- now if i put in shanghi great wall the sound plays fine and then i can pop the cd out and put another game in and manytimes it will work fine - this only happens if i boot the system with this game in the drive

so far this is all i had time to do since i got this yesterday -- could all this mean it just needs a good cleaning ?