How do I remove/replace the ram modules on compaq persario V2000?

Just remove the power cord, remove the case, then you will see the memory inside the slots. Release the catches on both ends of the memory then pull it out.

Maybe one of the memory chips is bad or one of the slots is bad.

Remove the Power Cord, Open the Case and remove one of the memory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x on it with an ink pen. If it fails to boot then move the chip to the next memory slot and try rebooting. If it fails take the chip out and set it aside, then put the other chip in and try booting it in both slots. If it boots, just to verify that the chip set aside is bad, mark an x on it and put it into the open memory chip slot and try booting.