so some times at the middle of the flight the fsx screen will go black !
the fsx is working fine and when i increase thrust i hear engine sound rising...
i use fsx in window mode.
Samsung S20C150 LED 20"
Intel Core I5 3470
Nvidia Geforce 630 2gig
8GB 1600BUS RAM
Clean out the old video drivers and load new ones.
See if that helps.