ASUS Motherboard QCode A2 | [H]ard|Forum. Hardforum.com A QCode of "A2" is "IDE Detect" according to the manual and google. So it doesn't seem to be booting properly on a cold boot when the motherboard has not been energized. This PC was built in 2012 and has worked without issue since then. ASUS mobo Intel 3770K 2x Samsung 830 256 Gig SSD's.