My A1200 was running 7 years consecutively except that it was turned off when I moved, fuse went off, added new hardware or similar unavoidable action. The fan on my BPPC died meanwhile but I never noticed that and continued to work without fan (I didnt know it was dead) until I sold it in 2002 or so.
Nevertheless it ran at least 2 or 3 years without ever turning it off and seven years almost consecutively. Uptime was only few hours or days, though.
