one Inon Z240 producing less light

Remove the button (it screws out) and see if the magnet is still there. Ofen they simply corrode to mostly just brown specs.

Bill

And if corroded indeed can i do anything about it?

A pair of needle-nose pliers on the button shaft should do it. I purchased replacement buttons from an Inon dealer and simply screwed in a new button. I've also switched the focus light button across and lived without a focus light button instead. If you could purchase a little magnet to fit the space then you could also probably replace the magnet itself and glue a new one in.

I tried really hard to make the magnet from the S2000 strobes to work and couldn't get it to go. If the magnet is gone then your local Inon guy (or Inon Japan) can sell you a new magnet for a few dollars.

Bill