Test your PSU power supply unit or replace it if your
power supply units fan is not working your PSU is faulty
http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm
Testing & replacing the PC's power supply
http://www.youtube.com/watch?v=hbNxhvm0czs
One bad lead can cause a computer to continue on a
cycle of restarting or to shutdown or fail to detect/ boot up a computer
hard drive
WARNING: Before you start
troubleshooting remember that you are dealing with electricity that can KILL.
http://www.kitchentablecomputers.com/static.php
- rules
Only work inside the computer case
when the power has been switched off and disconnected. Never open the power
source.
Some of the below steps
recommend removing physical parts within the computer.
While in the computer it is
highly recommend that you be aware of ESD and its potential hazards
Remove the memory modules from their
slots.
Take the
opportunity to clean the slots on the motherboards and the memory module
connectors.
Use compressed air to blow dust away
and clean contacts with a soft cloth.
Do not use a metallic vacuum cleaner
if it touches any component it may create a short and cause damage to the
motherboard or other components.
Do not use
solvent that may attract dust and never poke things like cotton buds in to
slots. lightly rub an alcohol (Methylated
Spirits) on a cloth not to hard let the alcohol do the work on the copper gold
or silver tabs and r
Allow the pins to dry.
They will air dry in a matter of
minutes.
If reseating the memory did not
resolve the issue try swapping the location of the memory.
If you have only one stick of
memory in the computer try moving it to another slot and then boot the
computer.
Check the memory module and memory
slot contacts.
They are either copper tin or gold.
The colour will tell you which they
are.
Mixing tin and gold can result in
corrosion that prevents proper contact.
Look for any sign of physical damage
to the memory module, memory slots or the motherboard.
Reseat the memory modules.
You should hear an audible click
when they are in place.
Do not use
too much force to reseat the memory module in to the slot this can cause damage
to the module, slot or motherboard.
The hardware that you are trying to
access is damaged or failing.
The device drivers for the hardware
are faulty or incompatible.
Could be a problem with the Hard
Drive or the Hard drives PCB
http://www.onepcbsolution.com/
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