Hello, I have a Dell Dimension 4100 with windows 98. The computer was working fine, I tried to add more memory and accidently put the stick of RAM in upsidedown. When I put it in right side up, I do not get a signal on the monitor, keyboard, or mouse anymore. The fan works(powered off of the motherboard) The other fan works fine. The battery CMOS is fine-had it tested. The jumper is on pings 1 and 2 of the motherboard. I tried resiting all cards and memory-only using one stick of 128mb RAM. No beeps, so I know the memory is working fine. It seems that the motherboard is just not powering up the monitor/keyboard/mouse for some reason. Any suggestions?? Thank you.