My poor old eMac keeps switching itself off. We tried another computer in the same outlet and found it shut itself off too. So I replaced the outlet the other day and when I came home I found the eMac off again. It switches off during boot, sometimes it will make it to the desktop or even a few minutes of actual use, then just switches off. Can the pram battery make it just shut off during boot? Or just shutdown in the middle of work?