My onkyo subwoofer does not turn on the green ligth is not on, what could it be? is a swk-200

It sounds like the amplifier is overheating, check if fans are working and clean dust from heatsinks

Hello Johnny, As a test to see if the subwoofer is working I would have you run one simple test. Unplug the subwoofer from the receiver and apply your finger to the end of the cable. If the subwoofer is working then you will hear feedback through the receiver as you put your finger on it. If there is no feedback this is usually a good indication that the subwoofer is no longer working. Thanks, FJD

does the green light power up on the back? If not the power supply is bad

sub woofers are very powerful bass , with incredible sounding technology. your problem might be with the woofer wall around the circle. open the box and take the woofer out.Check if there is any tare over the corners of the cloth. sometimes there might be a crazy noise because of a little opening in the cloth caused by small tare.. if so better change it with a new 1 and make sure that the new cloth has guaranty
damaged sub woofer eg. torn cloth-
Thanks for rating good luck

The amp output stage or the power supply is shorted. Service shop type repair.

whatisthe codewriten behindtheoutput of the onkyo subwoofer skw 150my out put is bad in sucha way that ican not retrieve the the code

A subwoofer is just really a mono amp for the signal. As with all amps if you touch the audio section/parts with a small screwdriver, you should hear a buzz from the speaker. (Follow the audio wires to be certain you are on the audio section). This can be used for testing the amp section. If you get no buzz or noise (anywhere) at all then it's power supply could be playing up. If you have a multimeter you can test it looking to see if it is getting power. Allways suspect any part that is on a heatsink. Before removing any suspect you can put the part numbers into Google to see if you can get them and it will give you a clue to cost.
PS don't short any parts when you touch with a screwdriver, and don't put it on the power parts.

ther should be numbers on the ic go to nte semiconducters .com and put #in will give u replacment part .

The receiver automatic speaker set-up set the sub volume at -12 and since it was not getting any signals from the receiver it was doing what it is supposed to be doing (going to the standby mode). This was troubleshooted by Onkyo tech support on a Sunday. All the best about Onkyo customer support.

Sounds like power problem of some sort ,have you read the instructions properly.some of these will have on/off switches in the wierdest of places