Firstly, there is no way whatsoever that any piece of domestic electronic equipment can dim house lights as the excessively high power consumption taken to do that would blow either its internal, or alternatively the plug fuse, however "if" the equipment mentioned is plugged into an adaptor socket which is also used for the lights then that symptom is an indication of a faulty socket or adaptor. Secondly, once the exact cause of the above situation is determined and rectified, and if the JVC device still responds as was mentioned then it indicates that its power supply is shutting down for safety reasons, this most likely because there is a defective component somewhere which is drawing a heavy current, a likely place being the power amps.