Hello Goodnight. I tell you that I put myself carefully to check the MAIN BOARD, I found a diode that at first glance looks good and when measuring it on the plate with the multimeter is perfect; but when I look at it with a magnifying glass I see a deterioration as if it had burned, the reference is not clearly noticed. When looking for it in the service manual it appears as B0JCPD000025 and only says that it is a diode, it does not specify whether it is a zener diode or a schottky diode which in the figure shown looks more like the 2nd. Investigating the network of this forum I found that a colleague was looking for this same diode reference with a GW95330 butt that has the diode on its surface. I have searched for it in different ways and I have not found it or its replacement. Please if any of you have any of these 2 references in pdf or another file that can provide them to me; I would be grateful. https://adjuntos.yoreparo.com/imagen_post/0004/41/9768977bdfcec9c1ebcb8e1e6ad98c10719e949c.jpeg" alt="" /> Doing more tests in IC2101; I jumped with a resistance of 1k, pin 2 = tuner input R with pin 32 = R out and heard a noise in the plotter; I decided to solve all the integrated IC2101 and verify again; To my surprise, the tuner signal was already heard on the plotter through pins 31 and 32 of IC2101. I verified that there was already an input signal in TDA8950J AMPLIFIER IC, but there was no output signal. Apparently they had sold me a defective TDA8950J AMPLIFIER IC; As these pieces do not have grantia, I bought it again in another warehouse, I placed it and the equipment worked completely.