Hello everyone, they brought me this equipment that, when pressing power, turned on and off after a few seconds, the LED flashing. I took out the integrated STK433-320 turns on and everything works, change the integrated and a resistance of 0.22ohm 5W the sound worked perfectly and everything, but when plugging in the speakers of the equipment it was protected again, it was the same as they brought it to me, (the speakers they are good, they were tested on another team). Now I disassembled it and checked all the components of the board, including the surface ones that go underneath, the resistance that I changed is good, as I found nothing wrong I disconnected the protection, leg 7 of the connector. Everything works fine now. My question is, what happens if I leave it like this, with the Protection disconnected? Does anyone know what else it can be? Grateful