Okay, so my grandmas computer was working perfect but some how it won't even come up. It acts like it will but then it comes to a screen where all it say is no input signal change settings to 1024x768-60Hz I'm usually pretty good at fixing things like this but I've tried everything I know and its not working for nothing. It is a windows HP computer. The weird thing is I can hear the computer actually coming up but its not letting off of that screen! PLEASE HELP!!!!