How come my dell dimension 3000 desktop doesn't work after upgrading my RAM?

SOURCE: Dell Dimension 3000 PC Desktop Burned Out w/Memory Upgrade

you have onboard video and cant install a video card. your mb. has nooooo agp or pci-ex. sounds like you installed your memory upside down and fried your motherboard. toasted it even. please dont be mad at me.

SOURCE: replacing RAM in Dell Dimension 3000

Upgrading RAM will not affect your files. Just make sure you upgrade with compatible RAM & that you install it in pairs. So if you want 2 GB then you would want to be 2 x 1 GB RAM chips. Hope this helps & please remember to rate my answer. Thanks.

SOURCE: Dell Dimension 3000

There is an L shaped lever on the back. Press and hold that down and push side panel of case back. It will lift off. When you put it back on just align the slots on the bottom edge and push forward to close it.

SOURCE: i need a new processor and motherboard for a dell dimension 3000

As posted by Smithbrother, you can't just put any motherboard in a Dell--the case and motherboard are built for each other. You would be better off buying another computer. A new motherboard means a different processor (like you want). This means a different, higher speed memory.
You can have a system built by a local computer person or browse some of the sites (you can go to Dell for some real deals--as well as other company sites).
Any new system will not have "only pci slots." The new boards will have PCI-E slots for your video, but will also have some PCI slots for expansion.
Cost? That's hard to say. I have to do an estimate for each of my clients depending on just what they want.

SOURCE: dell dimension 3000 desktop won't play sound

Hi,
Download the Drivers for the audio.
go to Support.dell.com website and  enter your service tag and download the right drivers for your computer.
Thanks, PREM