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Preparing the PC Case
Unpack the PC case and place it right way up on the work
surface (if it does not have a PSU already fitted, unpack
your separate PSU and place it carefully on the work
surface.) Find the mains cable for the PSU, but do not plug
it in just yet.
Opening the Case
Check your case instructions to determine how to remove the
outer casing (or in some styles, side cover panel). This
should give you clear access to the inside such that you can
fit all your new equipment. Once this is done, carefully lay
the case on its side, so that the opening faces up.
Fitting the PSU (if necessary)
You will notice at the rear of the case there will be a
large hole (at the top in most cases). You will need to
install the PSU, such that the fan outlet and power socket
on the PSU will face outward and the power connectors all
hang loosely inside the case.
The example on the right demonstrates a correctly fitted PSU.
Notice the four fixing screws (circled in red) that hold the
PSU in place. It is also important to make sure that any
'ventilation openings' on the PSU case itself, face toward
the inside of the PC case. The PSU has a secondary function:
to draw hot air out of the PC case and push it out of the
back.
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