I'v adde 1 gig/1stick of memory to my machine an it's fine. when I add the second 1 gig stick my machine will not even boot to bios? Any i advice on getting the second DIMM2 slot working. It also has a red light on next to it. and a green light next to the good memory slot. Thank you

Hello.

At this point, from what you described, the memory stick or the slot could be the problem.

First check the 2 memory sticks to be certain that they are compatible with each other - the type and speed. That could be your problem.

If OK, remove both memory sticks and try the second stick of memory in the first slot. If it works, the 2nd memory slot is problematic.

If it doesn't work, your 2nd stick of memory is bad and needs to be replaced.

If the memory slot is bad, there really is not much you can do except replace your motherboard.

Hope this helps.