# Replacing Fuses

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The MFFT is protected from drawing too much current by two fuses, situated in a compartment above the mains input.
With the instrument unplugged, use a tool such as a flat head screwdriver to open the compartment. There are two fuse holders with white arrows on to indicate the direction. Slide these out, and test the fuses with a multimeter.
If the fuses have blown, replace them with the spares provided.
 
![image description](../_images/1756288980898-Fuse.jpeg)

If the instrument still does not power up, or the fuses blow again, please contact your supplier for support.