advice on v7 ribbon problem

[elotunes]

hi my friend, i appreciate you taking some time to try and help me out. This is how it stands. If i switch on , press the button , the drive spins and the screen ends up at the browser menu with the dancing electron going on beside the writing, at this point the drive stops almost like a relay has gone off, the browser screen remains. just to complicate the issue, after a while i lose all video probably as it all heats up. i let it cool down and it goes back to the above. now i`m confused. any thoughts. cheers dave..