Yes. Everytime I turn off the monitor this happens. I've not timed it, but it takes several minutes. For example, I shut the monitor off for lunch. When I return it's in it's irretrievable sleep mode. This does not happen in the Sleep Mode.
It's not a brand new monitor.
I'm using the same graphics card that came with the computer.
I used NFR (Nasty File Remover) to delete everybit of the previous nVidia drivers
. Then I installed a fresh copy.
There are some posts that suggest that large SATA hard drives might be the problem. Mine are in the 250GB range.
The big clue for someone is that none of this happens in the safe mode.