Peavey Pv-115d 15" 2 Way Powered Speaker - "hum speakers" Questions

Peavey PV 115d humming noise Dj speakers does this speaker make this noise when it is on with nothing plugged into it?

very pronounced mid-rangy hum immediately after power-up with nothing connected to it. None of the controls (vol/tone) seem to affect it. Is this a common problem with an easy fix? Probably bad ...

...hum from the speakers. Are you good with replacing surface mount components while wearing 5 to 10 power loupes to see what you are doing? Do you have a controlled heat soldering station, anti static ...

...in a pice of wire in and choose the correct input button and then turn up the volume. If it starts humming, you are on the correct input. On that input you plug in a device giving enough power ...

...equlizer knobs turned up about about 2/3. So when i turn up the master volume fader a really loud hum deep bass sound comes out. It vibrates the whole table. Also the ground wires are messed up. ...