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Carvin F300 not working

So my Carvin F300 poweramp is not working at all. When i turn the switch to on their is no response. I've looked around inside and it doesn't appear to have any wires pulled and nothing looks broken. I did find that it has a tiny fuse that pulls out from the very back of it next to the speaker plugins.

Anyone have any clue to what could be the problem since the power doesn't seem to be coming on?