I bought a slot A3+ motherboard (Gigabyte ATX GA990ZA-UD3-R5) with an AMD FX-8320E CPU. It works fine, all eight cores are enabled, dual-channel memory works, as well as everything I could test (audio, SATA, lan...) I'm actually posting this question from this new machine.
But when I turn it on, it prints no POST messages at all. It displays a splash screen offering me to press a key to enter setup. But after that, the screen stays blank until the bootloader starts writing. Is this expexted, or is the motherboard defective?
I think it is doing POST, but not writing POST messages to the screen. BIOS seems to have no option related to that.