changing bios

Check the Motherboard manual if you have it,a page description will show you the exact tab that it is listed under

To change in Bios
Boot the computer,when startup screen appears,press the designated key to enter setup (shown in bottom left corner). Enter bios configuration,locate the Advanced tab,click on it,then go down the list until you locate the Graphics card line,highlight this section,right click and it should give you the option of pci and agp,select the agp,exit and close setup

If you have no video at all, (even at POST) you may need to reset the CMOS memory in order to be able to enter BIOS setup.

There usually is a jumper on the motherboard to reset the CMOS.

Set the jumper to the clear CMOS position.
Boot up the PC.
Shut down.
Return the jumper to the normal position.

When you boot up, press the proper key to enter BIOS setup and verify that all settings are as desired.

Chas

To suplement chas's answer if you cant find the Jumper removing the battery for 30 min or so will often reset the bios.