Stick a popsicle stick in through the grill in the back of the power supply
to very temporarily halt the spinning of the fan blade, check for the
absence of noise, and remove the stick. If it is the power supply fan
making the noise, your options are: (1) Buy a replacement; or, (2) Open up
the power supply (after having to remove it from the case) and replace the
fan. The fan is usually an 80mm fan just like the ones used for case
cooling fans. Be sure you orient the fan so it blows outward (there's an
arrow to show air flow direction). Sometimes you can simply remove the
screws holding the fan and slide in a new one. Case fans might have 3 pins
(12V, ground, and sense) whereas the power supply fan only has 2 pins (12V
and ground) but you can probably still use the 3-pin 80mm case fan inside
the power supply simply by sliding the connector on the header pins so that
the 12V and ground leads get connected. If the power supply fan's wires are
soldered onto a circuit board, you probably don't want to dismantle the
whole thing and do some desoldering and soldering. Just cut the wires,
strip them, and splice the new fan's wires to them. I would slide some
shrink tube over the wires, mesh them together, solder them, slide the
shrink tube over the splice, and use heat to shrink the tube so the spice is
insulated well and you don't get any shorts (and make sure the wires don't
get into the fan blades). If replacing the fan inside a power supply is
beyond your capability or you just don't want to bother, get a new power
supply. Getting a shop to replace the fan will cost you as much as a new
power supply.
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My new PC makes a whole lot of noise. I think it's the fan from the power
supply, but I'm not sure.
Has anyone any thoughts on how to make it more quiet?
Marc
