After 2 yrs I'm suddenly have problems with it going into protect mode. Took it in and was told the ground connections were poor. Was resoldiered. Lasted 6 wks than the same thing took it back again couldn't find anything. Worked OK for 3 days than back into protect mode. tried disconnecting componets 1 at a time, same with the speakers. Also checked the speakers resistance. nothing helped. Finally it hung up while trying to change inputs. Took it in again and they replaced the DSP this time. got it back 3 wks ago & now its back to the same thing-turn it on & in 3sec. in goes into protect and shuts off. HELP!