mx 5021 isn't starting

hi need help cant figure out why my speakers are not starting up there is no power coming to the controller and the plug aint sparking any more... like the power plug went loose a couple of times trying to move the extension cord then suddenly the speakers went of and they arent starting anymore... the back of the woofer says the unit is not serviceable and no serviceable parts inside... i really dont understand what went wrong the plug use to get loose earlier due to which the system would stop but it use to power up again.. i'm from india and in my city there are no authorized service centers.

Speakers, in most cases, must be broken into to access the electronics. This is probably the case with yours. Some have fuses internally, and some do not for the power supply. You will have to purchase new speakers.