My ps3 stopped reading discs after the first game change following the newest ps3 update.functions normal otherwise. The xmb bubble is present but the disc does not spin or load to menu. Like so many others I assumed my laser was burnt, upon exploration and cleaning advice i found that the disc properly takes and seats the disc. The laser flashes and then sits idle. The IC chip could possibly be bad as the drive motor never spins. I do not know if replacing this laser will accomplish anything. The IC chip seems to be ball joint solders so replacement is not seen as reasonable. Do you think its the laser or the controller chip. If I replaced the controller board do i have to worry about "marriage? or firmware?