Can someone help me figure out why I can not get my computer to start up in normal mode. When I start it up in normal mode it comes up like it is loading then it just goes blank and my monitor just shuts off and the on/off light just blinks. I alos keep getting an error that says snmaster.idx database needs to be restored. I bought this computer from a pawn shop and I do not have a system recovery disk for it. I have also lost all sound on my computer.