Build Advice New build won’t post

[daveyboggs]

Hello Everybody,

Sorta tech savvy but this is only my second build. Pc will turn on, fans will run but pc won’t post and nothing on screen. Mobo has codes C2,C4,12,54,59 and CPU error light on the bottom right of mobo. I have made sure all connections are good. Double checked cpu and mobo pins. Ram is seated properly. Tried G.Skill F5-5600U3636E16GX2-TZ5S and Corsair CMK32GX5M2B5600C36 DDR5 ram in 2 and 1 slot configs in all slot. Reset cmos. Made sure bios is updated to right one (F20) and still nothing. Same codes and still no post. Please help.

CPU Intel Core i9-13900K 3 GHz 24-Core Processor
CPU Cooler Noctua NH-U12A
MOBO Gigabyte Z690 AORUS MASTER EATX LGA1700
RAM Corsair Vengeance 32 GB (2 x 16 GB)DDR5-5600 CL36 Memory
Storage 2x Samsung 980 Pro 2 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive
GPU NVIDIA Founders Edition GeForce RTX 3090 Ti 24 GB Video Card
Case Corsair 5000D AIRFLOW ATX Mid Tower
PSU Corsair HX1000 Platinum 1000 W 80+ Platinum Certified Fully ModularATX Power Supply

 

[rgd1101]

take the gpu out and test with igpu

 

[daveyboggs]

take the gpu out and test with igpu

Took out GPU and plugged Display port into mobo and same thing. No post and same codes.

 

[rgd1101]

F20 add support to 13th gen
could try the latest F21 bios.

 

[daveyboggs]

F20 add support to 13th gen
could try the latest F21 bios.

I’ve tried F20 and F21. Same issue and I just left it with F20.

 

[daveyboggs]

F20 add support to 13th gen
could try the latest F21 bios.

Correction, just updated bios to F21 and now it won’t even turn on. I get the red power light on mobo to come on but when pressed it does nothing. No fans, no lights, no codes, dead.

 

[rgd1101]

rma the motherboard

 

[daveyboggs]

rma the motherboard

Seller accepted the refund and rma is in progress. New mobo will be Gigabyte Z790 Aorus Master. Gonna be at least a week before it arrives. I will update when it arrives and I test it out of the case.

 

[daveyboggs]

rma the motherboard

New motherboard same-ish issue. Wont post. Z790 mobo shows a bunch of codes, then stays on D9 / AD and VGA error light is on. Fans work, lights work, keyboard and mouse light up. Also swapped CPU for i5-13600K. Same issue. Different RAM, in different slots. nothing changes.

 

[rgd1101]

start with just the cpu and ram. no gpu/ssd, see if that get you into bios

 

[daveyboggs]

Fixed!!!

Turns out old board, ram, and both CPU’s were all probably fine. Since both were K’s and have intergraded graphics clearly you’d want to use that for initial boot but that’s not the case. Only way to get it to post was with GPU in and hdmi connected. Not even display port would work. Spammed del key for a minute on a black screen and boom. It posted.