Lights cut out when front brake is pulled

Hi everyone,

My px200 has developed a bug whereby it loses all power to the electrics when I pull the front brake.

The switch looks perfect (I took it off and cleaned it a bit, but there was nothing visibly wrong with it) and there are no wires being pinched, at least in the headset. The problem developed out of nowhere while I was riding one day (ie, I hadn't changed anything or taken anything apart immediately before it happened) so I'm assuming something's come loose or broken.

Any ideas? I'd be really grateful for any help.

Hi:

Does your brake light come on?  Does the rear brake work normally?

Mike