my amp is new and been using it with v-guard digi 200 for a little over 20 days, i used it yesterday with no problems, i always switch off amp first before turning off main plug, today when i pushed the power button it showed only red light(no flashing) tried clicking power button on remote nothing happened, than switched off everything checked all wires than turned the volume knob down, than tried turning on again with same results than upon spinning the source select dial the amp turned on and was working normal, my query is it normal or is it something i should be concerned about?