If your Kenya Power meter for keying tokens is not displaying anything, then make sure it is connected to a power source (socket or extension).
If the meter is not showing any digits after connecting to a power source then it means two things. Either the fuse is blown that is why power is not passing or batteries are worn out.
Consider replacing the batteries (if there is no power) or your fuse (if there is power). Thereafter, connect directly to a power socket. Do not use extension.