I bought a Cam v4 from Amazon, and unwisely delayed setting it up for more than 30 days, so I can’t return it. When I tried to set it up it produced a buzzing/sizzling sound as soon as it was powered up. It sounds like the buzzing is coming from the speaker, rather than a circuit frying. I never get any indicator lights, and don’t get a chance to do proper setup. Any ideas about how I may be able to save this thing?