Smoke on my power amp

All I know is that the vast majority of amps I own or have owned have a huge warning in the owner's manual that states not to operate the amp without speakers being hooked up. And I think you now know why. It is NOT safe to operate so don't even think about it...

Most amplifiers have a protection circuit that should prevent damage when the speaker wires are shorted. My Vincent and McIntosh amps both shut off immediately when that happens...Don't ask me how I know....   

Well, I feel so stupid about what I had done.
Anyway, I was trying different preamps, different IC cables, different speaker cables, and different sources (CD/SACD players and phono cartridges). While I was playing around, I got a bit sloppy.
I would still like to have the amp with a built in protection mechanism to prevent such case. It is so harmful to the power amp, but having no built in protection mechanism for $5K amp a decade ago does not sound right.
I cannot find any clear damage from these two inside photos. Any of you see burnt components or circuits? Thanks much.
https://photos.google.com/photo/AF1QipPSt_CM_-03crVgXYW6NBwEgfAXc3eNWuPSAlBJ
https://photos.google.com/photo/AF1QipNIz2uuUz90t-qmUl15mIkIjsxDoqVbj8YsuPLa

Technically, once the blue smoke comes out you need to send it for repair to have the smoke put back in.

Plug your amp to a 'Dim Bulb Tester' to find out if any repair is required.

https://www.youtube.com/watch?v=wRFRwOnLsZI&t=15s