BLACK SCREEN after Mojave Install on Mac Pro 5,1

[X--X]

I really need help from someone smarter that me.

• Installed Mojave on Mac Pro 5,1 (upgraded from 4,1) with AMD Radeon 7970
• Firmware Update and Install went normal
• After Install Mac Pro boots with Apple Logo but then goes black
• I get (error) sound from keyboard entry
• Mac Pro shows up on the Network allows file access
• I can connect via Screen Sharing from my Macbook and ALSO get a black screen

It tried SMC Reset and PRAM reset. What else could I do?

 

[h9826790]

I really need help from someone smarter that me.

• Installed Mojave on Mac Pro 5,1 (upgraded from 4,1) with AMD Radeon 7970
• Firmware Update and Install went normal
• After Install Mac Pro boots with Apple Logo but then goes black
• I get (error) sound from keyboard entry
• Mac Pro shows up on the Network allows file access
• I can connect via Screen Sharing from my Macbook and ALSO get a black screen

It tried SMC Reset and PRAM reset. What else could I do?

You can try

1) unplug and re-plug the monitor cable AFTER your cMP boot to desktop.

2) boot from the original unflashed ROM