I just changed out my MB and now have a MSI- B75MA-P45 board. Since doing that I have trouble the first time I go to start up in the morning. When I turn my computer on my monitor is just a blackscreen. If I manually shut down and then restart everything works. During the day you can shutdown and restart as many times as you like without a problem. Could there be a problem with my motherboard or power supply? My power supply is 600W with 40 amps. I have the latest bios installed in the MB.