Trying to add a second hd to my Dimension C521, I powered it off, removed the power and SATA connector from the DVD drive, and connected the new HD. I'm unable to get into the BIOS by pressing F2 during the startup. Actually, no key responds (ESC, F2, F12) and Vista just comes up.

I moved the USB keyboard connected to the first available USB slot on the back, but still no success. any ideas welcome.

 

Model: Dimension C512

AMD, Athelon X2

2G RAM

2 onboard SATA controllers (one for HD, one for DVD)