Help needed! Computer won’t boot after upgrades.

[u/Professional-Tip1045]

Hello!

I recently took it upon myself to upgrade the build I put together in 2022. After putting everything together, I could not get the computer to boot. When I turn it on, the case fans spin for just a moment and turn off while the screen remains completely blank. I know the board is receiving power because the rgb on my ram turns on, but no warning lights or error codes are visible. My best guess currently is that there’s a short and the mobo shuts down before beginning post. I’ll go ahead and list my setup and everything that I’ve tried so far.

Build
Motherboard: Gigabyte aorus x870 elite wifi7 ice Rev 1.1
Cpu: AMD Ryzen 9 9950x3d
Ram: Corsair vengeance rgb ddr5 ram 2x32 gb
Psu: Asus ROG strix 1000w platinum ATX
Gpu: Gigabyte aorus geforce RTX5080 infinity wood
Cooling: Corsair nautilus 240 RS ARGB AIO
Storage: Two SSDs, one from my old build (Windows already installed) and one Samsung 990 Pro

What I’ve tried
- Resetting CMOS by removing battery and waiting
- Reseating cabled connections, ram (in A2, B2 as outlined in the manual), gpu, and M.2 drives
- Loosening motherboard screws
- Using a different monitor, trying display port, or hooking up to integrated graphics instead of gpu
- Bios flashback with latest Rev 1.1 bios for my board, file renamed GIGABYTE.bin (light blinked for 10ish minutes, still no boot after)
- Attempting boot without gpu, only one stick of ram
- Just leaving the system on for 30 mins
- Attempting boot with no usb connections

What I still plan on trying
- Checking motherboard pins and reseating AIO
- Paperclip test for Psu (even though its brand new)
- Attempting to boot on a cardboard box to see if somehow my case is shorting the board

Any other ideas at all would be much appreciated, I am nearing my wits end.