Gigabyte GA-MA785G-UD3H Question

[LSC_YA]

I just installed a Gigabyte GA-MA785G-UD3H with AMD Phenom II X4 945 Deneb 3.0GHz 95 watt. Runs great but there is one problem. When it boots uo a lot of times it will post and then go to a black screen with a small n on top of a big N with a green rectangle box beside it,course blinking Some time you have to reboot 2 or 3 times and then boots into windows fine. What is the problem causing this, any help will be appreciated...thanks

Seasonice 550 watt
4 gigs of ddr2 pc800
1 320 gig seagate os is on (windows 7 ultimate 64 bit )
1 terabyte W.D. storage
1.5 terabyte Seagate storage

 

[QuietIce]

Are you using the on-board video?

 

[LSC_YA]

Well i ATI 3870 and it did it, now i am using the on board video and it still did it. Well yesterday morning I booted up and into windows it goes, hasn't done since Sunday. Wish I knew what caused it...thanks

 

[sct]

I have the same problem that mobo too it will post and then go to a black screen with
on-board video , if i dont use a kvm switch it works fine