Zenith II Extreme - Post error, will not boot

[DERTY13]

I've been trying to figure out why this new build is failing to boot. The machine does all it's normal checks but ultimately just displays a post error. I've been through one round of support with Asus and they recommended I return the board and replace it. Did that, same issue with the new board. You can see the whole layout and all the codes that show up while it power cycles in this video:

The memory is G.Skill DDR4 3600 CL16. I've tried even just using a single stick. Best I can tell the errors are not related to CPU or Memory as the Q LED's do not stay lit on those.

The graphics card sometimes has a VGA issue reported on the Q LED. Sometimes it doesn't. I figured out last night that might be caused between the board and the case (Lian Li) not allowing the GPU to fully seat. I loosened up the board to let the card seat a little better while also removing the heat sink that runs along that back edge of the board as it appears to bind. I've tried three different GPU's that all work in other machines, a RTX 2070 Super, Quadro RTX 8000, Quadro GV100. With the adjustments to the board the VGA Q LED light no longer appears. Changing the video card PCI slot or no video card doesn't change anything.

I've tested both the Corsair M2 Gen 4 as well as a WD Black M2 Gen 3 and that also doesn't make a difference. Changing the M2 slot doesn't change anything.

Last night I stripped it all down. Reseated every power cable, removed every RGB, USB and every other input to the board so that it's just the CPU, 1 DIMM, 1 M2 drive and a GPU. I've flashed the bios, reset the CMOS. You can see that run through here:

Any thoughts on how to troubleshoot this further would be greatly appreciated!

[Oguzbir]

Hi,
I solved my POST issue whilst trying to post with 3-4 gpus I got the error code D4.

The solution was to turn on the 4G encoding. Wonder if it helps you too.

[nomy]

Oguzbir wrote:
Hi,
I solved my POST issue whilst trying to post with 3-4 gpus I got the error code D4.

The solution was to turn on the 4G encoding. Wonder if it helps you too.

I have a similar problem...
Trying to connect a firewire pcie card which I know work on my asus x99a mobo.
I've tried to connect two different cards which I know should work!

The computer wont even pass bios. stops on "Detect HDD" OR "Loading VGA"
I've tried everything I could find on google and been looking for a solution for weeks.

Been in contact with support that just made me fill a form to send to ASUS HQ. But no more answers... been waiting for a solution for weeks from ASUS and been sending mails. If I have to wait one more week without a reply I will send this MOBO back.

Tried the 4G encoding but it didnt work.

I also have LIan li.. so my last tests will be to see if the case is preventing something.