Computer Specs:
Dell Dimension 2400
512 MB RAM
A lot of dust

I need to get into the system BIOS and possibly select from a boot device. However when I press the F2 key to enter the BIOS, the screen remains blank. The same thing happens with the boot device menu. The BIOS make no beeps. The system will boot normally into Windows and will work fine. I've reset the CMOS battery and swapped the CMOS battery and still no avail. Any ideas would be greatly appreciated. Thanks in advance.