I've had a bit of a problem with one of my Tannoy 502 monitors; Basically, they have a 'voltage select' switch on the back which allows you to choose between 100-120 volts and 220-240 volts (two settings). The right speaker was making a strange buzzing noise so I thought I might have used the wrong voltage, and I foolishly changed the voltage from 220-240 to 100-120 while the speaker was still on. It appeared to turn itself off normally without a bang or anything, however now it won't turn back on. The problem is not that the speaker has blown, as the light that shows whether or not it's on doesn't illuminate. I want to know if this is fixable or not, and whether the speaker is broken or perhaps the kettle lead or extension cord is broken. If anyone can help I'd appreciate it, electronics is not my specialty as you can probably tell.