after disconnecting my tv from cable tv and hooking it up to an antenna, the power light flashes continually but manual power button won't respond nor will the remote control, so I have a dark screen with no sound. The only way the power light will go off is by unplugging tv from the wall outlet. My neighbor has the exact model tv, and hooked it up with the same antenna in my apartment and it works fine as does his remote for both tv's.