Every time I unplug my MDD from the wall OR leave it plugged in but leave it off for an extended period of time (3-4hrs). The machine wont boot without havinf to remove 3 sticks of RAM. It will always boot with 1 stick of RAM and after that i can add the other RAM and it will boot fine. I dont think its the PRAM battery as I have already tested it and replaced it. Anyone one know what could be the problem? I'd appreciate any suggestions thanks.