I have 2 v9 ps2's. one works perfectly the other one i bought from ebay as a faulty unit. the faulty unit powers up fine but will not spin any discs. the laser flashes red but the worm gear does not move the laser at all. I have replaced the laser, worm gear and spindle with the working ones from my working ps2, but the ps2 will not spin the discs. What else am i missing? is the motherboard f**ked?? PLEASE HELP ME!!