remove the lid and look under it the wire from the button might of come of or if its not got a wire and it pushes on to the top of the syphon then maby the plastic bar has snaped of without looking thats all i can surjest . . . sorry about my spelling not one of my strong points . . .
H.E
March 2010
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix toilets.