2. Disc not spinning, but inserts/ejects as normal - The problem could be a dead laser, spindle motor, or laser movement motor.
To check the laser, open the Wii and, in a dark room, insert a disc into your Wii. You should see a red light if the laser is working. If you don't see it you probably need a new laser. See our Wii Drive Laser Replacement Tutorial.
Next, check the laser movement motor. With the Wii open, insert a disc into the drive and see if the motor turns on and the laser moves back and forth. If it doesn't move at all the motor is probably blown. See our Wii Drive Laser Movement Motor Replacement Tutorial.
If the other tests show nothing you most likely have a blown spindle motor. See our Wii Drive Spindle Motor Replacement Tutorial.