Good morning everyone I have a Sony MHC-V4D model the initial fault was protec4 The fan was verified and everything is fine. Replace the ic amplifier TAS 5630b with the TAS 5631b and it no longer shows the protec 4 and turns on normal but there is no audio. When I turn it on, the relay is heard but there is no audio. After several attempt to turn on as he tried to output audio but it was protected 01. My question is whether the original 5630 amplifier is compatible with the 5631 and therefore the lack of audio. Seeing the datasheet there seems to be no difference. If someone has had a similar fault please give me a hand. The voltage coming from the source is ok at 50v. regards