AT&T Tilt Flashing Screen

[Ryche316]

I have the AT&T tilt which came with WM6 pro. I upgraded to WM6.1 pro, Since then my screen will light up, then shut off, and it will do this at random and on an intermit basis. When the screen lights up, it's just the back light that comes on, none of the destop icons or time or anything else will show. This happens without touching the phone, and it doesn't matter if the battery is at full or low charge. This happens with the phone just sitting on my table without the charger plugged in. Has anyone encountered this? the only articles I've come across said to deactivate the telenav, which I already did.