Pistol
По этим ссылкам не пробовал смотреть, может чего-нибудь есть?
Owner's manual
Service manual
Dell Dimension Help file
Добавлено через 14 минут:
Смотри чего нашел:
Changing Boot Sequence for
Future Boots
1. Enter system setup.
2. Use the arrow keys to highlight the Boot Sequence menu option and press <Enter> to access the pop-up menu.
NOTE: Write down your current boot sequence in case you want to restore it.
3. Press the up- and down-arrow keys to move through the list of devices.
4. Press the spacebar to enable or disable a device (enabled devices have a checkmark).
5. Press plus (+) or minus (–) to move a selected device up or down the list.