Re: What is involved in swapping a power source
- From: "RJK" <notatospam@xxxxxxxxxxx>
- Date: Tue, 14 Aug 2007 20:12:45 +0100
Whilst changing the power supply unit is in principle a reasonably simple
task, some case designs are such that the psu cannot be removed until some
components are moved or completely removed. e.g. slightly older 5 1/4"
drives may need to released and temporarily moved forwards. Some PC cases
even demand that cpu fan/heatsink, and sometimes even the whole motherboard
are removed before psu can be removed and replaced.
Temporarily secure fan blades whilst "blowing out dust-bunnies" using
compressed air, to prevent damaging "fan generated voltages."
(back-voltages)
The 24 pin motherboard main power connector on ATX 2.0 psu's usually has 4
pins on the end that snap-off, or unclip, for connection to "older" 20 pin
socket on such motherboards.
regards, Richard
"Malke" <notreally@xxxxxxxxxxxxxxx> wrote in message
news:OufEHzm3HHA.1188@xxxxxxxxxxxxxxxxxxxxxxx
JD wrote:
In the last couple of days, I posted a couple of questions about
noises emanating from my 15 month old WinXP computer, and I was
encouraged to make a ghost copy of my harddrive, which I did. Today,
I again had some difficulty booting up the computer (it did eventually
boot after about 8 tries), and this time I had the back of the
computer facing me. In that position, it was clear that the noise
coming from the computer was coming from the fan on the power source.
I have a new ATX power supply that I bought in case this turned out to
be the problem. My question is how do I go about replacing the old
power supply or the fan? Are there common mistakes or traps that I
should avoid. I would add that I have a standard desktop computer
case that is roughly 8 inches wide and 16 or 18 inches tall.
Paul has given you a lengthy explanation of power supplies which, while
interesting and thorough, may make you think the project is too daunting.
Replacing a power supply is easy and you can do it. Here are simpler
instructions:
Unplug the computer. Open the case. Touch something inside that is metal
to ground yourself. If you live in a high-static area, you might want to
get yourself an anti-static wrist strap.
Carefully disconnect the power supply connectors from the hard drive, the
optical drive(s), the floppy drive if one exists, and the main power
supply connector on the motherboard. If there are any other connectors to
the motherboard itself, make a note of where they are and disconnect them.
Tip: If you are not very familiar with working on computers (or even if
you are!) making notes about where things are connected before you
disconnect them is A Good Thing.
After you have disconnected the power supply connectors from all the bits
inside the computer, use a Phillips head screwdriver and unscrew the power
supply from the case. Carefully remove the old power supply. Put the new
power supply in its place, screw it down, attach the connectors to where
they need to go.
Tip: While you have the machine open, it is a good idea to do a little
housekeeping by blowing out any dust bunnies with a can of compressed air.
A clean computer is usually a happy computer. A dirty computer will be
sullen and one day refuse to work.
When everything is where it should be, make a check of the inside of your
computer to make sure you didn't dislodge anything and that all
connections are snug. Do not close the computer case at this time. Plug
the computer in and start it up. If it starts up correctly, shut it down
(from Windows) and close the computer case. You're done.
Malke
--
Elephant Boy Computers
www.elephantboycomputers.com
"Don't Panic!"
MS-MVP Windows - Shell/User
.
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