If you find that your scanner light does not seem to be moving, then your scanner belt could be the problem. Your scanner belt could be damaged or worn. This guide will help you to replace your scanner belt.
Lift up the lid. Then be sure to examine the glass. If there are any cracks or broken fragments handle with extreme care.
Locate the black and white hinges.
Gently lift out the black and white hinges.
Next, locate and remove the four 10mm screws.
Gently, pry off the top plate, starting from the back of the printer.
Remove the black component by gently pulling it up from the black scanner belt
Press down on the white release and force it in toward the spring as shown. While you do this, pull the scanner belt out of the track.
Take a new belt and put it in the same way that you took it out.