Does the system actually work after this? You can check for a BIOS and chipset driver update. It's very very odd that it takes 10 minutes for the POST to show up, especially if the system works fine after that.
After it starts up, check if there is a BIOS update for the system. I don't know what could be causing such a long delay in the system starting, if the system is in warranty you may want to contact their support.