Good afternoon friends this time as an information and help please this mono block amplifier came to me that was protected by short-output mosfet transistors replace them. Ok now it turns on without protecting itself in green LED but in low output terminals it is giving me 65 fixed volts when it must be 0 volts. I thank you for helping me this amplifier and it came from another technician who told the client that this amplifier had the small card that it carries in pre amplification (the one that is vertical on the motherboard). It is difficult now because if it was damaged some superficial circuits of that card are 4 and all of them sanded the identification. My objective is to know the number of those circuits in the first place and to advise me on something to know why it gives me output with voltage permanently. I thank you, Blessings