Help! My computer keeps turning itself off. It happens at no particular point, not using any particular software and can go for ages without any problems. I'm running Windows XP on a Packard Bell PC with loads of space left on it. Thanks
Assumming the machine is resetting itself (switches off and reboots) the most lkely causes are
The power supply unit (asumming machine is 3 or more years old) PBs are notorious forcheap PSUs.
Overheating - clean out grills and dust, clean fan blades and ensure all fans running.
If renewing a PSU check:
1. The physical size of your PSU, some are hard to replace due to being a non standard size. 2. The amount of power need from the PSU don't skimp. 3 The correct connections for your equipment
1. Physical Dimensions
Besides the specs and form factors, the physical dimensions are also important factors in selecting a compatible power supply. Here is an outline of the physical dimensions of most standard power supplies:
# ATX: 6x3.5x5.5", HxWxD. Most common. Uses 4 mounting screws. # Mini-ATX: 5x3.5x5", HxWxD. Rare size. Uses 4 mounting screws. Can be used in a regular ATX case, but often not the other way around. # MicroATX: 5x3x4", HxWxD. Use 3 mounting screws. Not interchangeable with ATX or miniATX. # Flex ATX: Even smaller than Micro ATX. Various sizes according to case specs; often not interchangeable.
Use the data above to determine if a particular power supply would fit your case.
The quality of a power supply can be estimated by its weight. While this is not a true scientific or thorough measurement of the power supply reliability, it is nevertheless a very simple and easy way for ordinary PC users to estimate and compare the quality of a power supply. Why weight matters click here
3. Correct connections Some boards have 20 pin connectors others 24 pin There is often a 4 pin plug required to power Intel CPUs Molex D plugs for IDE HDD and CD/DVD drives SATA power connections for latest HDDs and DVD drives.
A CPU can overheat within a matter of seconds if the heatsink has become slightly unseated. At start up start pressing the delete key and go into the BIOS and look under the PC health status and see what the temperature is.