Power subwoofer/power but no sound

SOURCE: SubWoofer

Sounds like your original and this sub have bad amps. The amp for the sub is not the same as the amp for the other speakers. The old unit has a dead amp and this new one is on the way out. (Pulling too much current on high bass)

SOURCE: Kenwood Home Theater

Please update your post with any Model Numbers that you can retrieve, especially the subwoofer. Off hand, and with the limited amount of information that you have provided, I would GUESS that your subwoofer is simply overheating, and is being shutdown internally, hence protecting the fuse because no short is detected. If you haven't moved and or vaccuumed/cleaned around or near your system regularly, dust, pollution, pollen...you name it, builds up and can easily prevent electronics from breeathing/venting properly.

SOURCE: subwoofer makes loud popping crackle intermittently

im having the exact same problem thinking it was the amp i rigged up a different driver,the amp was fine.i knew the driver wasnt gone and after some looking and testing i got it down to wire mesh(i think a dust sheild,something)inside which was slightly rubbing on the coil,it worked fine loud when it was warm but cold there was bursts of bad feed back noises.

SOURCE: Philips Home Theatre System - no sound or power light on sub woof

reset the device to factory settings, it is written in your manual how to do this. If that doesnot work, unplug the powersocket for about 30minutes, it will cause an internal reset which might solve it.

Edgar

SOURCE: subwoofer goes to sleep

It is not getting a strong enough signal.... when you have the sub setting on the receiver to low the sub likes to go into sleep mode..... try turning the sub signal up on the receiver and the sub amp down to get the desired level.