I bought a 6400 second hand cheaply and am in the process of making a few upgrades. It's got OS 8.5 installed and had older browser versions on it (IE 4.0 and NS 2.0!) I wanted to upgrade. I downloaded the IE 5.1 files and installed them (eventually - had problems un-Stuffing a couple of times). Then I kept getting a "error 2" alert when trying to run IE and would freeze so I had to shutdown using the power button on the back of the CPU. I found out that it was because the program kept running out of memory. So I allocated 10MB min and 20Mb preffered memory to it. Worked fine. But now I can't even boot up. When I press the power key I hear the fan switch on, but no "bong" sound or power light or boot progress on screen. The CD drive opens and closes and I can hear the fan. Because I bought this second hand I never got the OS installation or boot disks. What do I do? I've looked on some forums for similar posts and I've seen it could be a dead PRAM battery. Would it be?