MacPro 2011 will not wake? (black screen with keyboard light on)

Hi FYIP

Thanks for info. I have actually already completed all those and the following Apple support advice. Since it's an older machine Apple doesn't support technical advise and I'm just hoping someone has the fix or some sort of work around. It's a bit annoying to have to either turn off the machine after each use OR force it off and startup before each use after it's moved into sleep mode.

Any help appreciated!

site referenced

https://support.apple.com/en-us/HT204760