Posted 01 December 2008 - 07:03 AM
If you change the video card in a computer, regardless of the fact that Windows will not have the correct drivers to match the card, the monitor should still show you the POST display screen, and you should be able to press the correct key and enter the BIOS setup screen. If a (working) replacement video card still provides no signal to the monitor, the fault is caused by something else.
Do you hear the single beep that the POST issues when the equipment check is successfully completed? If not, then it appears the computer cannot start up. This can be caused by various faults, but one easily solved is if something like a static zap has scrambled the CMOS memory settings. If you haven't already tried this, most motherboards have a jumper to clear the CMOS settings - it is usually located near the CMOS backup battery on the motherboard (typically a silver coin-type Lithium battery), and may be labelled something similar to CLR_CMOS. With the system disconnected from the mains, the jumper is moved for a few seconds from its current position to bridge the adjacent pin, then returned to its original position. Some boards require you to remove the CMOS backup battery for a period of time to achieve the same result. For more precise detail, refer to user instructions for your computer or motherboard.
If this procedure restores your system to a bootable condition, you may then need to enter the BIOS setup screen and select options like the desired boot order for devices.
Top 5 things that never get done: