Nuala
Chris Kitmyth
May I ask who you bought this computer from?
They should have set it in BIOS for a thermal shut down in the fans failed.
It was made by a work colleague of my Dad's, who's in business with his son.
I wouldn't know the difference between a "thermal shutdown" and a normal one. All I know is that the PC cut out a few times and then finally just refused to turn back on again.
Please accept due apologies for not explaining it.
A normal shut down would be you switching off your machine in Windows via the shutdown command in the start menu or by a forced shutdown. It can also be a shutdown via a network of a remote machine, but in either case its a shutdown which is planned and not unexpected.
The BIOS can be set to shut down a computer for safety reasons and will do so automatically if one of these conditions is met.
Most motherboards will have a temperature sensor sitting underneath the CPU itself. You've probably never seen one before, but they're there and they are as close a damned to monitoring a CPU's actual core temperature.
In the computers BIOS you can set a temperature level where, if this thermometer breaches, it will force shutdown your machine. You won't have much control over this shutdown, it's a fail safe. Think of it as a "Your machine could catch on fire -- switch off now"
Being that the fan which sits on the heat sink over the CPU is quite frankly the most important fan in your PC, the BIOS can also be set to monitor this fan as well. The fan plugs into the motherboard and the BIOS will have a direct feed as to whether it is active and spinning or not.
If this fan fails, there is nothing to cool the heatsink thusly free up cooler air onto the CPU itself. This is essentially going to cause your CPU to overheat, possibly exploder or catch on fire.
Thus, the BIOS, if it detects this fan has "failed" (stopped working) it will shut down your PC.
As these shutdowns are at a computer level and not the user level (Windows), you don't have the luxury of the option. It's either shut down or melt down so to speak.
...and for the record, I have operated an AMD cpu without a heatsink on it and it didnt smell particually good.
...and that was after 2 seconds...