blown amp diode?

[Basshead808 10+ year member]

Hi everyone. My amp suddenly stopped working. Fuse was blown on amp. I then put in another fuse and as soon as I connect power to the amp (Hooking up battery terminal) the fuse blows on amp again and agian. Then I finally realized that my amp might be blown. Maybe the fets but I seen this diode and it looks burnt. half of the diode is good but the other end is black and the middle is brown.. maybe this is the cause?

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