Heyhey,
I am happy to let you all know I have a solution for this problem after searching for ages.
The bios loads to quick for your monitor/connection. There is an option in the boot menu, or in the bios somewhere that's called " Post Delay Time " Which is usually set to 3 seconds. Sometimes, that's to quick for older monitors/cables whatever to load the bios. Change it to 9 seconds, and you'll have a bios again!
Bzzzz Electabuz out!