Without silent-block, here is the method
for lowering the noise level of a Blue an White G3 (light
As usual, I cannot be responsible for any damage to
your machines when you will experiment the following
I took a special fabric used in kitchen's cupboard
buiding which has the peculiarity to reduce the noises. The
fabric roll is 150 cm X 50 cm: quite enough to reduce the
noises for a lot of machines! It is made from a transparent
plastic layer with several soft "bubbles" on its surface.
Protection plastic sheets used in air freight packages
can also be used, provide they have not too thick "bubbles".
One can also use large plombing joints or rubber for
reparing shoes soles!
Well, "Out Of Topic": The left yellow arrow shows the cap
which hide the processor frequency's jumpers and the right
arrow points to the jumpers set to 400 MHZ... instead of the
original frequency 350 MHz.
Unfortunately, trying to boost it to 450 MHZ just offers
a "OpenFirmware" panel ;-)
All this thanks to: http://perso.wanadoo.fr/keaps/overclock.html
Yellow arrows show the most principal noise's origins.
From left to right and bottom to top:
the CD drive
the power unit's fan
the mother board's fan
and finally the hard disks.
Blue arrows point to two screws to be removed to extract
the big fan's craddle.
Once the screws have been removed, do not forget to
disconnect the fan's power cable!
Yellow arrows on the top show the removed screws, yellow
arrows on the bottom the locations where they were
Blue arrow shows the fan's power cable connector.
The yellow arrow shows one of the screws which fixed the
fan to its craddle. Unfortunately, they are screwed within
the structure of the fan itsself: therefore they transmit
the noises as well as the vibrations of the fan!
And that's why we've to insulate them.
As the fan is dissambled, remove the fan sticker (if any)
and put a little bit of sewing machine oil on the fan's axis
Do not forget to place back the sticker!
I place the fan onto my fabric and takes both its
internal and external footprints.
I can cut the fabric at the right dimensions..removing
the part the internal footprint demarcates.
Now, create the screws holes: either with a specialized
tool used by leather worker to make holes (here) or any
other tool for making small holes.
Blue arrow shows the small cutting out which has been
made to avoid that the wind generated by the fan trills the
With the residues of the footprint's cutting out process
above, I cut small square pieces and creates a hole in it
for the screws to pass through...
Il also cut out two other pieces with a rounded top.
These will not so reduce noises but help me to put the fan
back in place :-)
On the top of the picture, one can seen one of this screw
which fix the fan and its "noise reducer".
Now, let's operate the hard disk.
Yellow arrows (from left to right) point to the IDE
connector and the power cable connector: both of them have
to be disconnected.
Blue arrow points to the small screw which prevents the
hard disk's craddle to slide to the right: this screw also
has to be removed, as well as the small piece it maintains.
Yellow arrow points to one of the guides which lock the
The blue one shows the move away sliding direction.
Craddle out: the 4 fixations screws.
So, same as above: small pieces cutted out in our fabric
residues... small holes in them to allow the screws passign
We place one of them above the craddle metal sheet, the
other one under; the blue arrow shows on which side the hard
disk is to be fixed on.
Our Noise reducers in place!
When putting the craddle back into place, take care that
this craddle is inserted within its guides... otherwise
noise will be higher that the level our homemade's reducers
And again, follow the above instructions in reverse order
to re-assembly the whole stuff.
Well, I did not have much time to operate the power
unit's fan, neither the CD drive. Next tutorial perhaps ;-)