This bad boy was THE bane of one of my teachers. On her defence, she was old, probably over retirement age, but she just could not make this thing work. Ever. She usually turned it on, but left the cover closed. Or tried to turn it on while AC cable was unplugged. Or turned it on, but put everything in it mirrored. Or turned it on, placed everything right, but fucked up focus so it was blurry. It just never ever worked out for her...