Ok, so I just left my laptop running with the lid open for a couple of hours as I normally do, and when I came back it had a black screen with white text and commands covering the screen it says Some things about patents, media test failure, and No bootable device. It is a 17" HP Dv7 and I have had it since January of 2013. It is in "PXE ROM". This is the first time it has had a problem like this! PLEASE HELP ME ,THIS IS URGENT!!!!