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  1. #1
    ROG Member Array Doza18 PC Specs
    Doza18 PC Specs
    MotherboardMaximus IX Formula
    ProcessorIntel Core i7 7700K
    Graphics Card #1Poseidon GTX 1080 Ti
    CasePhanteks Enthoo Evolv ATX TG
    Power SupplyCorsair AX1200i
    OS Windows 10

    Join Date
    Jun 2016

    A2 error code, need help

    Hello, I'm in need of help, I've been looking for a solution to my current situation on getting rid of post code error A2. Unfortunatlely all the info that I've thus found is to no help to me and I would like to present my issue with anyone willing to help out.

    A bit of a backstory first. My current build is not new I've had this set up for about half a year enjoying my games and such. I was planning to watercooled my rig for a long time and took time to get all the necessary components. So in the last few months I finally got everything I needed to get going on putting a custom watercooled system. So I began the task, after I finished putting everything together I booted the system and I was greeted with a 55 error code. I looked online to find the answers and drained all the fluid out of my system and went as far as removing the cpu to check for bent pins I couldn't figure it out at all. So I then decided to strip the entire build and start from scratch. As I was doing just that I decided to just turn on the system and the error code 55 was gone, it showed A2. I put a few things back into place to see if I can replicate the 55 error code and found out that my Aquacomputers USB hub was connected incorrectly and causing a short on my system.

    So now I'm greeted with only a A2 error code. Mind you this is showing with only a M.2 drive installed. I have an SSD and HDD but they were not connected when I first got the A2 code, this lead me to beleive that I could finally get into the BIOS cause I had pressed the clear cmos button several times be this. But I also didn't have a display connected either so I put everything back together filled my loop again and hooked up everything booted and I still have the A2 error but Im not getting anything to show on my display. Weird thing is my keyboard is working and when I press F1 the code goes to A0 and everything seems fine just still no display. I connected an hdmi from the motherboard to the display and still nothing. I've reseated all of my RAM sticks and used just one on every slot still nothing. I'm really stumped on this one and need of any help.

    My current rig:
    Asus Maximus XI Extreme
    Intel Core i7 9900k
    4x Corsair Vengeance RGB Pro 8GB
    Asus Strix RTX 2080 Ti
    Samsung 960 256GB M.2
    Samsung 970 1TB SSD
    WD Black 2TB HDD

    Again everything was working perfectly before I installed the watercooled components.

  2. #2
    ROG Guru: White Belt Array AS185 PC Specs
    AS185 PC Specs
    Laptop (Model)Lenovo Y700-17ISK
    MotherboardZenith Extreme
    ProcessorAMD 1950X
    Memory (part number)8 x G Skill F4-3200C16D-32GTZKW @ 2666MHz
    Graphics Card #1Nvidia Titan RTX
    Sound CardIntegrated SupremeFX
    MonitorSamsung Odyssey G5 C34
    Storage #16 x PNY 2TB XLR8 CS3030
    Storage #23 x 1TB Crucial MX500
    CPU CoolerThermaltake Water3.0 Ultimate
    CaseCorsair Obsidian 900D
    Power SupplyCooler Master MasterWatt Maker 1200W
    Keyboard Razer Ornata Chroma
    Mouse Razer Mambe TE / Logitech USB TrackMan Wheel
    Mouse Pad steelseries Cyberpunk 2077 edition
    Headset/Speakers Logitech Z-5300e
    OS Windows 10 Home x64
    Accessory #1 Asus Hyper M.2 X16 Card V2
    Accessory #2 Asus DIMM.2 card in slot
    Accessory #3 KingMod Corsair 900D Silencing Kit
    AS185's Avatar
    Join Date
    Feb 2020

    I had the same problem a while ago but it was happening due to the wrong connection between the graphics card and monitor. At that time I had plugged into a Panasonic TV and for some reason, the graphics card wasn't displaying anything at all. I couldn't find any information about the A2 error code anywhere on the net.
    Last edited by AS185; 12-05-2020 at 09:33 PM.

  3. #3
    ROG Member Array
    Join Date
    Feb 2019

    CODE A2, IDE Detect, error code means it's having trouble detecting or reading connected drives. This often occurs during initial boot of a new build if multiple drives are hooked up before an OS is installed.

    possible solution

    I encountered this A2 error code issue with an Asus Deluxe WiFi board and the sync/charge cable for a Polar Loop wrist band (the cable had been plugged in while pc was shutdown)

    Removing it and rebooting worked.

    Posting for the sake of posterity.
    Last edited by MiLoG; 11-24-2020 at 05:42 PM.

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