Two days ago, my emac began shutting down suddenly, without warning, as I was using Photoshop. The screen went blank and the Epson 825 printer stopped in mid-line. When I started the emac up again, there was no error or disc scanning message -- it just started up as usual. I thought the problem was connected to Photoshop, but now the emac is shutting down 10 to 30 seconds after I start it. Unfortunately, I don't have access to my puchase and support materials. Can anyone give me advice as to what is happening and what I should do? Thanks.