Remove the four screws at the bottom of the unit and take off the bottom cover.

Remove the screw in the middle of the PCB, and remove the PCB keeping the top of the unit on the table top.

Scrape off the epoxy glue by the big blue capacitor being careful not to break the fuse wire.  Replace this capacitor with a 1uF 400 volt device.

Replace the smaller capacitor with a 100nF 400 volt device.

Remove the 22 ohm resistor, and stand it on end in one of its mounting holes; add another 22 ohm resistor in series with it. 

The 275 volt varistor has been soldered underneath the circuit board across the incoming 240V mains supply, but after the fuse.

This picture is pre-modification.

This picture is post-modification.