Ok, before you say the fan is faulty, read on. I have an Acer which, after booting up, the cpu fan will just...stop spinning. However, the computer will remain ON (ie bios will still be functioning, windows will still run normally etc). The system does not go black, restart or anything..it boots up as normal. I have replaced the fan, quite a few times, but all is to no avail. I have changed RAM also and same thing. The fan/s will run for approximately 10-20 seconds before just stopping?