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Maximus IX Formula A2 Code No Post

Hey everyone,

I just replaced my motherboard, CPU, and RAM on my machine since my last Mobo died on me and I couldn't replace the parts since they were so old.

Anyway, I have the following:
- Asus Maximus IX Formula motherboard
- i7 7700k Kaby Lake
- 2x16gb G.Skill TridentZ 3200 RAM
- EVGA GTX 980 Ti video card

So I rebuilt everything, had it all hooked up and I got the A2 error code. After some googling I tried the following:

- disconnect all harddrives
- clear cmos
- flash bios
- checked every connector on my PSU
- disconnected and unpowered graphics card
- used onboard graphics
- tried different dimm combos including single dimm in every slot
- reseated cpu fan header
- tried memok
- tried safe boot

None of these worked, no matter what I still get A2. I have no video, I can't even get into the BIOS, not even a ROG boot logo. It's my understanding that I should be able to get bios with just a PSU, CPU, and RAM, but I can't even get that. Any suggestions on top of what I've already tried?

Thanks in advance.
Reply to Matthew_246
14 answers Last reply Best Answer
More about maximus formula code post
  1. Hi, A2 is ok, so it might be a video issue. If using a tv, try with a monitor. If monitor, try borrowing different one, with a video cable and testing.
    Reply to alexoiu
  2. Sorry to disagree as Qcode A2 is IDE detect meaning a problem with Bios recognizing your Storage device be it HDD or SSD. You will not be able to get into your Bios until the error is rectified.

    Check all SATA cabling and connections and try clearing CMOS or updating your Bios.
    Check your OS drive in another system or try another drive.
    Very often the BOOT_DEVICE_LED is also lit on the MB.
    I am assuming ofc that you have an OS installed.?
    Reply to MeanMachine41
  3. BIOS having issues in detecting a bootable device means that all other tests have passed and there should be a signal on the monitor.
    "You will not be able to get into your Bios until the error is rectified." is not true.
    Reply to alexoiu
  4. The last phase of POST is either AC or AA when the system enters ACPI mode and hands over to the OS.
    It is then that an output to monitor would occur.
    One of the last thing POST does is check for a boot drive and if none is found would bring up an A2 error.
    To say A2 is OK is not true either.

    Lets not not argue about this alexoiu as this is not being helpful to the OP.
    I have my opinions as do you and the OP needs to check all the advice given.
    Reply to MeanMachine41
  5. MeanMachine41 said:
    The last phase of POST is either AC or AA when the system enters ACPI mode and hands over to the OS.
    It is then that an output to monitor would occur.
    One of the last thing POST does is check for a boot drive and if none is found would bring up an A2 error.
    To say A2 is OK is not true either.

    Lets not not argue about this alexoiu as this is not being helpful to the OP.
    I have my opinions as do you and the OP needs to check all the advice given.


    I agree. It's important to understand the error codes, for troubleshooting correctly. If using a board that outputs error codes, try removing all storage drives and starting the board. See what code getting and if any output on monitor.
    It's wrong to suggest that a board would not access the BIOS with no storage drive or bootable device connected.
    Reply to alexoiu
  6. I don't mind you quoting me as I feel your paying attention however,
    Rather than continually quoting me alexoiu, would it not be better to explain to the OP as to how he can access his Bios. Don't you think that would be more helpful.
    We both know that hitting the delete key on and of during Post cycle or using the correct function key will access Bios or offer boot function, however if an error occurs during Post then what is your little trick to get him there.
    Reply to MeanMachine41
  7. As a first start, the board would get him to BIOS anyway. No need for Del key. The fact that he gets no signal on monitor/tv is different story and I've suggested the steps to follow in my first post here.
    Reply to alexoiu
  8. As stated in my original post, I have no drives connected because it's another variable and because you can access bios without drives. I've tried with them connected and without them connected. I've tried different monitors and different cables and built in graphics. I get the A2 error without ever getting video in all cases. If A2 means no boot drive detected I don't see why it wouldn't still go to bios. And yes, the boot device led near the 24 pin atx is on and solid.
    Reply to Matthew_246
  9. Have you tested with graphics card removed? What video cable using?
    Reply to alexoiu
  10. I have tested with the graphics card removed, I'm using display port.
    Reply to Matthew_246
  11. Best answer
    I suggest testing the DVI port too.
    Reply to alexoiu
  12. In case anyone is wondering, I use raid 0 for my boot drives, split between 2x256GB SSDs. Until I get into the BIOS to setup raid I won't have a valid boot drive (from the motherboard's perspective)
    Reply to Matthew_246
  13. I switched to a HDMI since I don't have DVI and I got video! I sure hope after it's all fixed I can use DP still since I have a Z35 200hz monitor. As of right now that's the solution! Ill post back here if it ends up not being the answer. Thanks alexoiu!
    Reply to Matthew_246
  14. No problem. Not sure why the DP does create such issues.
    Reply to alexoiu
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