so my zt1000 died. sometimes it will half boot up, most of the time it won't at all. all the lights come on, but no sound no screen. when it does actually boot, most of the time it won't make it past the windows xp splash screen, and when it does, it cuts off about 5 min after it's on. i've tried replacing all the ram, i've tried using a CRT, i've even tried formatting the HD and installing diff OS's. any ideas as to what the problem might be?