I know I probably need to call Verizon Support, but in the short term, any help? The STB (VMS4100) starts revving like it's overheating or running the motor/fan at a high speed for some reason. This happens about every 3 to 4 days, and lasts until we unplug it, which silences it for a few more days. It's really noisy, but more of a concern is if it is a fire danger. The box is probably 6 years old and is the only STB that we have. Thanks for any advice.