During my last dive i switched one off then later when i tried to turn it on only the modeling light would work so i though maybe the battery was nearly flat.
I charged the battery and turned it back on and the flash still didnt work and then it was making some weird noised as it was charging up then made a popping sound and now the modeling light wont work either.
It doesnt look like any water has got in and the red "ready" light still works if i switch it to on.
I'm thinking that needs to go back to Ikelite.
The red light is an indication of battery strength, not the strobe.
Good luck with it.