its in the desktop, do i need a new one or can they be fixed?

Go to a few computer stores and ask if they carry your brand of computer.
Tell them you need a new power supply (with France's input voltage
settings!). If it is for the same make/model, it should have all the same
connectors and be a fairly straightforward install. If all you can find is a
"generic" power supply (you must match the watts rating on your old power
supply to the new one -- sometimes it is stated like "200W"), it should be a
no more than a bit of a small puzzle to make it work for someone with basic
computer/electronic skills (I'm sure you know *someone*).

Good luck,
FBt