If a switch on the M9 is sticking or broken. i would suggest taking it to an authorized service center for repair:
Line 6 Customer Support
Currently Being ModeratedJul 11, 2011 11:36 AM (in response to heyhowudo)Re: RE: M9 B1 Switch Broken?
In Australia, Music Link is the Line 6 Distributor and they also handle service-related issues for Australian customers.
This assumes that you purchased your M9 from an Australian Dealer (that ultimately answers to Music Link):
Music Link Australia
29 South Corporate Drive