Dell System Dimension 4550 Series Pheonix ROM BIOS PLUS Version 1.10 A08 I just put a new hard drive in, and now the computer refuses to boot whatsoever. The only screen I get to says..... Striking both F1 or F2 does nothing, you just hear some kind of error beep. I've always gotten this message with the old hard drive, however hitting F1 actually let you boot into that hard drive. I want to be able to boot into this hard drive, and figure out why I get this message whenever I boot so I can 86 it all together. This computer was previously owned, so I don't know much about this history of the old hard drive. I know the hard drive I'm trying to put in is pretty old and quite handled. Here is the old hard drive. Deskstar 120GXP hard disk drive Here is the new hard drive. Newegg.com - Western Digital Caviar WD800BB 80GB 7200 RPM 2MB Cache IDE Ultra ATA100 3.5" Internal Hard Drive - Internal Hard Drives