Ok i don't know if you managed to solve that but i was stumbling with the same issue, i have a Samsung c32HG70 monitor and a Samsung 55" KS8000 + Nvidia Graphics card with the same problem.

The...

My problem is the very opposite, my monitor allways goes blank when the computer is innactive for 5 minutes, and i can't get it to stop doing that, messed in the configs in the monitor benq2430xt,...