No display on monitor...

I have a rather old HTPC with a sempron processor, and all of a sudden there is no picture. There are two short beeps after the computer starts up, and it stays on, but there's no picture. I've tried different monitors and adding in a new graphics card, but there's still no picture. The gpu it was using was dedicated.

Any ideas?

Hmm, I think I have had the same issue in the past with 2-3 other computers.

For some reason when it beeps, it means that the two little plastic "switches that snap tight on the RAM to keep it from going loose" were not completely snapped in place. When those switches are not completely snapped into place, then the computer won't start up and you will only hear beeps. Try making sure you pushed the RAM all the way in the slot so that the switches make a snapping sound or feeling (use your best judgement, don't literally push so hard you snap something). Let me know if this helps.