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Have an ageing Mesh PC (Athlon XP 1.67/ 768 Mb/ XP SP2). Recently would not start when power button pressed. Cleaned all fans and case interior and checked connections and all was well for a few weeks. Now, once again, the PC will not start up....the Motherboard has a green light showing it is receiving mains and I can get the 'power on' light on the case front to weakly flicker occassionally but nothing occurs. Is this a PSU fault do you think ? Thanks.
Is this a PSU fault do you think
Always the weakest point on a Mesh
and classic symptoms of a failed PSU
Thanks guys.....I'll come back if that doesnt work !
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.
2. Power supply calculator 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.
Guide to changing PSU
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