cancel
Showing results for 
Search instead for 
Did you mean: 

Asus ROG Maximus z790 Hero Not powering up

pwbc
Level 8

I am upgrading my PC with the above motherboard, an Intel i9-14900KF and Corsair 32GB DDR 6200 memory. The power supply is a Corsair RM850I and the cooling is a Corsair H100i Pro. The system will not power on, so there are no Q codes and no Q LED info. I can force it on by shorting P On to ground, which gives a Q Code of 00. I have tried resetting the Bios and tried alternative memory. I contacted Asus technical, who helpfully told me it was hardware failure and to contact the supplier. Who in this case was Amazon, who equally helpfully referred me back to ASUS, who in turn referred me back to Amazon. As the system does not respond at all, is the motherboard the most likely problem.

It is very frustrating, as my exiting build is Z590 based, so I cannot swap out. I have tried a different Corsair 850 W power supply to no avail. The only thing I haven't tied is a new processor, which would involve more cost.

Any suggestions would be gratefully received.

326 Views
1 ACCEPTED SOLUTION

Accepted Solutions

Worth checking - there is a white sticker on the motherboard. Last 4 digits will be the BIOS as supplied. Just make sure it is Gen 14 compatible by looking at BIOS versions on the support page. If not, try using flashback to upgrade to the latest version. Nothing to lose. Also, I'm not sure if the Z790 Hero ever shipped with BIOS version not suitable for 14th Gen, so I'll leave you to do the research. It's just a suggestion before you send it back. Not sure if that's the issue, but only 20 minutes to find out.   

Z690 Hero, BIOS 3401, MEI 2406.5.5.0, ME Firmware 16.1.30.2361, 7000X Case, RM1000x PSU, i9 12900K, ASUS TUF OC 3090TI, 2 x 16GB Corsair RAM @ 5200MHz, Windows 11 Pro 23H2, Corsair H150i Elite AIO, 4x Corsair RGB fans, 3x M.2 NVME drives, 2x SATA SSDs, 2x SATA HDs.

View solution in original post

5 REPLIES 5

Silent_Scone
Super Moderator

Hello,
If local teams told you to take it back to the retailer they should accept it back. 00 with CPU installed would indicate a failure. 

Have you removed the CPU and inspected the CPU pin pad?

Attempt to remount the CPU and cooler, ensure to not overtorque and adhere to cooling vendor instructions.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Thanks for the quick response. I have removed the CPU, there is no obvious damage to the pins, I have even replaced the AIO with an air cooler. Still no joy, I will return the motherboard but am concerned it could still be the CPU. However I would have expected the board would have illuminated the CPU Q LED if that was the case.

Worth checking - there is a white sticker on the motherboard. Last 4 digits will be the BIOS as supplied. Just make sure it is Gen 14 compatible by looking at BIOS versions on the support page. If not, try using flashback to upgrade to the latest version. Nothing to lose. Also, I'm not sure if the Z790 Hero ever shipped with BIOS version not suitable for 14th Gen, so I'll leave you to do the research. It's just a suggestion before you send it back. Not sure if that's the issue, but only 20 minutes to find out.   

Z690 Hero, BIOS 3401, MEI 2406.5.5.0, ME Firmware 16.1.30.2361, 7000X Case, RM1000x PSU, i9 12900K, ASUS TUF OC 3090TI, 2 x 16GB Corsair RAM @ 5200MHz, Windows 11 Pro 23H2, Corsair H150i Elite AIO, 4x Corsair RGB fans, 3x M.2 NVME drives, 2x SATA SSDs, 2x SATA HDs.

Thanks for the tip, I did try flashback, but it didn't take. So the board has gone back. I purchased from Amazon, they don't offer replacements so I will order from Scan.

OK, then probably unlucky. Good luck with the replacement...

Z690 Hero, BIOS 3401, MEI 2406.5.5.0, ME Firmware 16.1.30.2361, 7000X Case, RM1000x PSU, i9 12900K, ASUS TUF OC 3090TI, 2 x 16GB Corsair RAM @ 5200MHz, Windows 11 Pro 23H2, Corsair H150i Elite AIO, 4x Corsair RGB fans, 3x M.2 NVME drives, 2x SATA SSDs, 2x SATA HDs.