I have a Dell Inspiron 8500 that starts up, shows the Dell bios page, then it goes to a black screen with the cursor in the top left corner and makes a constant beeping sound. I can access the bios of the computer by pushing the Fn and F1 keys at the same time. Other than that the computer does nothing. It stops beeping when I push any of the F keys, but will do nothing else. I have checked and can see no key stuck down. Any suggestions would be appreciated.