AMP: JCM 2000 DSL 100
Problem: It just stopped. All sound completely stopped. There is no noise going to the cab. Not even a fizz or buzz

Is it a fuse? Or is it a cable? The Tubes did not turn blue when I turned the stand by off.

I love my amp. If anyone can help, I would greatly appreciate it.
Try the fuse first. Then tubes. If you have a tube amp you should always have an extra fuse and an extra set of tubes on hand.

Or just get a solid state amp so you don't have to deal with bull like this.

"Punk is not dead. Punk will only die when corporations can exploit and mass produce it."
Jello Biafra

(so is it dead?)
I second that, I've repaired many amps that the only problem was a fuse.
Be sure to find and test all of them!
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Schecter Hellraiser Sunset FR
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Fender standard Tele
Ibanez Rga121
Taylor GA 214E
wait did you try other cables?
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Fender Standard Stratocaster black 1980s model
Epiphone EJ-200CE Natural
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Roland Micro Cube
Fender Hot Rod DeVille
orange tiny terror
First of all, check that your power cable is all the way in the back. Second, like others have said, your fuse. Third, check the cable between the speaker and the cab since you have no sound whatsoever. Then we can talk tubes.
Winner of the 2011 Virginia Guitar Festival

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Are your tubes lighting? If it's something with a fuse, I'd take it to a tech. If the fuse has blown, then there's something wrong somewhere to make it blow.

How do you say "I'm okay" to an answering machine?