I have an Ibanez Promethean P20 bass practice amp which I use for quiet practice at home in the living room.   My wife got the carpets professionally cleaned yesterday - I didn't know that she was planning to do this, or I'd have moved the amp.   The amp was covered & unplugged, and there is no obvious sign of damp, but the amp is no-longer working.   There is power to the amp - the LED lights and faint noise can be heard through the speaker which increases as the v