Amp stopped working?

[Tacobuster]

I have an old alpine mrp m500 that I have used in 3 or 4 different cars with the same subwoofer. I had it hooked up today and it stopped working. the power indicator is still blue but no sound! I pulled both 30 amp fuses and it stayed lit blue! I took the + and - from the output and touched them together... no spark and power light stayed blue.
Im guessing its toast?

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