20 Most Recent Boston Acoustics MCS 90 Horizon Series 5.1-Channel Home Theater Speaker System Black MCS90 - Page 2 Questions & Answers

Check the speaker surround to make sure it has not self destructed.

humming is frequency intereference problem circuitry, bad wires unprotected wires

it is designed to only connect to the soundbar

there should be panels or rubber feet with screws underneath. or the speaker part can come off. that would be where the mesh would be or holes for the sound to escape.

right and left speaker test working but no audio

Try Amazon. I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_aad3edb7dfa380b9

Fuses blow when there is an overload. The most likely cause is a short-circuited semi-conductor IE: a transistor or IC etc. If you find one of these devices inside it with a heat sink on it, that will be the most likely cause. Transistors can be tested with an Ohm Meter and in a short circuit fault such as this, it will be like you have put the two test probes together!

Short circuited component/s at its circuit board. Check and replace it. Check for shorted component/s at the amplifier stage circuit. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Check the wiring to that speaker and then the conections

Have you tried Boston Acoustics web site? Google manuals and see what you get