Gigabyte Z790 aorus elite ax ddr5 not posting

[Freakerman]

I cannot get this MB to post or even startup, only the LED above the f_panel inputs blink once, and thats it. I am definitely not the only person with this problem.

Even with no Ram or Cpu the Leds flash once when PSU is turned on. Something else to clarify is that I am the second owner of the board, previous owner had a fully working build with same ram en cpu, I actually bought the one stick of ram with MB. MB is 1 Month old.

Rest of PC Build :

13700k Trancend Jetram 2 x 16gb DDR5 4800 850w gigabyte psu Corsair 4000D Airflow Case

I am able to do a Q Flash Bios update, when ram and CPU is removed, as per Gigabyte's guide on updating with Q Flash button.

What I've done so far :

Updated the bios to current with Q Flash - only thing I can do currently with MB, Used different dates of Bios, Checked for bent pins on cpu slot, first thing I checked once MB received, Checked build for a short in case, Build components out of case, Different ram slots used, Different brands ram used, Other psu's tested, Cmos cleared, Battery replaced, 2 Different case power switches used (check if power-on connector is broken), Tried cpu_fan header plugged in, maybe MB needs to know if cpu is cooled - this MB doesn't seem to be bothered, Startup with mouse and keyboard plugged, some MB need that for startup - unfortunately not this one, Even used the leaf blower on it, like blowing into that old super nintendo cartridges back in the day.

/r/gigabyte/comments/15xhaby/z790_aorus_elite_ax_wont_power_on/

Same problem as this reddit post

Any help would be appreciated. I am about to RMA the board if no solution.

 

[Switch]

Considering how *new* this board model is, do an rma and save yourself hassle.

 

[Nyt Ryda]

I have the same board and it's been flawless.

I can see you've already troubleshooted a ton with no success, I think it's time to RMA. Just remember to take a lot of pictures especially of the socket, so that you don't have the supplier making excuses about it having bent pins etc.

 

[Nyt Ryda]

Different ram slots used, Different brands ram used,

Did you perhaps try one stick of ram in each slot until all 4 slots have been tried? Someone on Reddit discovered his board doesn't work with dual channel, only single channel in B1 or B2. Worth a shot if you haven't tried it.

 

[alcatraz5953]

Have you connected both 8 pin connectors? Sounds silly but make sure, have exactly the same board and on my first boot I had the same symtoms only to discover I was an idiot and hadnt connected them

 

[Freakerman]

Did you perhaps try one stick of ram in each slot until all 4 slots have been tried? Someone on Reddit discovered his board doesn't work with dual channel, only single channel in B1 or B2. Worth a shot if you haven't tried it.

Tested not working

 

[Freakerman]

Have you connected both 8 pin connectors? Sounds silly but make sure, have exactly the same board and on my first boot I had the same symtoms only to discover I was an idiot and hadnt connected them

Both connected Yes

 

[Freakerman]

Considering how *new* this board model is, do an rma and save yourself hassle.

Leaning towards this