MXR Phase 90 Issue

My MXR Phase 90 isn't working, the light turns on, sound goes through, but the phaser doesn't work. Theres also a big click sound when you press the button. Help please??

Anyone???

I think its broken.

i had an issue with mine. here is my thread. not sure it'll be much help to you. my friend wouldn't have found the problem without a signal generator, scope, and schematic. good luck
http://www.tdpri.com/forum/stomp-box/323477-phase-90-not-working.html