I need instructions

enter your Bios then Advanced settings there should be an option to turn of onboard graphics or switch to pci..

If you have hooked up the computer to another monitor and you still have no display, then your video might be bad. If you have display with another monitor, then you know your monitor is bad or the connection is bad. Be sure to check the connection, sometimes the video cable loosens and if that is the case you won't have any display.
I haven't looked up the "specs" on this system, but if you don't have any display with another known good monitor that works, you will have to determine if you have a video card or onboard video. If you need to replace the video, and have onboard, you need to have an open slot on the motherboard, there should be an open PCI or VGA slot available for a video card. In any case, if there is onboard video, you need to disable it in the setup after you install the new video card. Good luck hope this helps.

When you power up the computer press F1 or F2 or "del" key or ALT +F2 then you can see bios screen.
Then go to advanced menu and disable onboard vga .
Then save settings of bios and exit.
Then your onboard vga is disable so you can install vga card into it.
Let me know if you need further assistance.
Thanks for using FixYa.

No need to break the seal on the box -- there's nothing to jumper or switch inside there anyway.

Some video card/motherboard combos will let you do this, others force you to choose one or the other, but here's how you find out.

Right-click on "My Computer" and select "manage" This will bring up Computer Management
On the left side of the Computer Management window, find Device Manager and click on it.
Now, on the right side, look for Display Adapters, and expand it. There should be an entry for your GT120 and hopefully another entry for your onboard video. Right-click the onboard video device, and one option should be "Enable"
If you don't see this option, it's because your onboard video can't work at the same time as the GT120.

Let me know how it goes! Rate me if it works, comment back if it doesn't work and I'll see what else I can do.

I hate to say it but you will need an instrument cluster when they do what yours has done it needs to be replaced.

You should be able to disable the onboard video in bios.

Boot up the computer, and you should be able to press {Del} and the computer should load the bios setup program. My Acer is currently out for repair, but I believe the main menu will say something like "integrated peripherals," and from the submenu you should be able to disable the onboard video.

Thank you for your question, and please let me know if there's anything else I can help with.

-Mike

That NIC is end of life ...obsolete

You should first restart computer, then go to BIOS settings and disable the onboard adapter. Then boot up windows and install drivers for the new adapter and it should work. If that doesn't help, please ask for more help here.

Need computer make and model, or motherboad manufacturer and model number

is it onboard sound or is it pci please let me know, i need the make of the motherboard or pci card and what os do you have, 98, ME, XP or vista

Have you disabled your onboard video in the BIOS? Boot your machine with the vga cord to the motherboard. You need to get into the BIOS. Depending on the make of your machine you need you will need to hit the del key, f2, or even f1. Go to the periphrial setup and disable your onboard video. Save the BIOS turnoff the computer and plug the monitor into you vga card. That should do it. To change it back to your motherboards vga just reverse the instructions. Let me know what happens. Good Luck, Tim