The randomness suggests to me that it might be something to do with the PSU, or even a loose connection.
No, the Iyonix just does behave randomly when you try to switch it on. (Yes, I know that's impossible - but it does, all the same.) I have been enjoying months and months of freedom from this problem, with my Iyonix switching on every single time with no other prompt than the elliptical button. Suddenly (and nothing else has changed) it requires the round button as well, like it often used to, and now it requires that every time. Anyone who wants to tell me it doesn't have a perverse mind of its own, first tell me how to get it back to behaving decently. M.J.T. ---To alter your preferences or leave the group, visit //www.freelists.org/list/iyonix-support
Other info via //www.freelists.org/webpage/iyonix-support