Hey guys, I have a TiBook 800, 512 RAM, 40Gb HD, airport, running Mac OS 10.3 (I only use it for uni and converting windows using friends and haven't been bothered to update it yet as I often reinstall the system) and just recently it's starting randomly putting itself to sleep. No problems arise due to this other than the inconvenience of having to wait for it to get to sleep and start up again, and interrupted downloads. Any idea what this could be?