Hi there,
I appear to have the same issue when upgrading from 2.4b1 to 2.4RC.
The screen would not come back on with any amount of messing around.
I just went to the link below to sort out the logs for you, but the link is broken
Just FYI, I reverted back to 2.4b1 so I could use my screen in the interim period before the next version comes out.
Thanks!
Will