Q: A relative of mine decided to change the power
switch on the back of my newly made PC from 230v to 115v. Seeing as
I am located in Australia (where the wall voltage is 240V, 50Hz) the
usual happened... I wasn't there at the time, but I noticed I could
not start up my computer. After much time I realized what had
happened. My PSU had been blown!
question is, whether the hardware on the PC is still alive or not. I
know definitely not the $400 PSU...
A: There is a 50% chance that some, or
all of the hardware in your PC is still workable. If you had
a good quality power supply it's likely that the internal fuse
blew without taking down the entire motherboard with it.
To find out where your new PC stands - as
either a burned out hunk of electronics, or salvageable - I'd
recommend replacing the power supply and try re-starting up the
computer again. If it works, then all this little experiment in
230V/115V switchery cost was a new powersupply. If it
doesn't work, then you'll will need to try re-starting your
damaged PC with only the most basic hardware
components installed (video, memory, cpu, hard drive.) to
discern which components are fried.
If the PC starts up with the basic hardware, add one component at
a time as you go through and test the rest of the parts. If there
are any parts with visible scorch marks, it's best to assume those
components are toasted.
Be warned though. If the hardware in your PC was seriously
damaged because of the power failure, and you decide to try it in
another computer because the motherboard of the damaged PC doesn't
work, you could also damage the good PC you are testing that
hardware in. If want to try potentially damaged hardware in another
PC to see what works and what doesn't, do it in an older computer if
possible... in case it takes a bullet too.
There's some good advice on the subject of killing computers
in PCSTATS' Beginners Guide to the Most Common Ways to Kill A