Tripac Evolution APU won't start control light keeps acting up

My apu worked fine last night, today when I shut down it won't crank.
I turned the switch to the snow flake the blower started like it usually does, but sounded different like very weak and then it went off. So I turned it off and tried it again this time the blower did not go on and the control lights started acting weird it would dim then come back on like it was losing power. I kept hearing a light click coming from under my bed but that's all it does it just won't start in any mode. I checked the fuses and they seem fine not sure what else I should be looking at.

I have a video that I just uploaded to YouTube.



Does anyone know what this could be? I've spent the last hour looking online and can't find anything like this.

 

I couldn't check the unit outside cause of the rain , but I will check as soon as it stops, I just lifted my bed and checked the fuses in my bunk.
I did hook up my laptop but program wouldn't work I didint know I could download one, I'll try that right now. Thank you.

 

I changed the batteries about 5 months ago also cleaned all the connections, ill make sure nothing came loose once ot stops raining.

 

Wow that 50 Amp fuse was FRIED! This will have to be replaced, How hard is it to replace this?

 

I hear you, I'll def make sure it's better sealed.
Hopefully nothing else is messed up because of it, it literally melted the fuse.

Thank you guys for the help!