I cannot get my computer to boot. The only message I receive is 'no video'. I am unable to check the bios settings, boot from a cd, or safe boot. I have reseated the video card, checked the monitor on another computer, changed cables on the monitor, changed the backup battery for the bios to no avail. The computer was working without a problem when a friend checked her email and received a message that the computer is sleeping. Then all I get now is a 'no video' message. The computer powers up and the cd rom drives eject. The hard drive light stays yellow. Any thoughts or questions would be greatly appreciated.