Our main office machine has 2gb of RAM in one slot and there are 3 spare slots, one white and 2 blue. It uses DDR2. So I have this other machine where the hard disk died with 2 x 1gb DDR2 in it. I put the 2 x DDR2 into the 2 blue spare slots. Now the machine will not even start up, no display!
Any ideas please?