Actually I don't even trying out to repair it anymore. (I recorded this cause I wanted to ask my friends, but no one could solve this promlem) I just turn off it for over 6 months then, and once I need to print something so I try to turn on it again, and it runs with no any problem!! I have no idea why it's been repaired, but I think the machine may be used too oftenly :( *I used the scan function for over 100 times a week, I think it made the machine tired (?) Hope you could fix yours :)