So it appears my new build is DOA, and I’m not sure why, though I suspect a bad motherboard. I’ve assembled:
Gigabyte Aorus x570 Elite ATX
AMD Ryzen 9 5900x
G Skill 2 x 16GB DDR 3600 CL 16D-32GVKC
Gigabyte RTX 3080.
Corsair RMX Series (2021), RM850x, 850 Watt, Gold, Fully Modular Power Supply (CP-9020200-NA)
Silicon Power 1TB NVMe 4.0 Gen4 PCIe M.2 SSD
But I get a black screen when booting the computer up. Nothing has ever changed this. Here’s what I’ve attempted:
1. I attempted to Q-flash to a new BIOS (the MB shipped with Rev 1.0) using a flash drive and (one at a time) multiple new BIOS versions, from F30 up to F36e (all renamed to “gigabyte.bin” and the only file on the thumb drive, inserted into the BIOS USB slot). In every case, the (Qflash) LED failed to light up, the MB fan didn’t spin. I tried this with CPU and RAM in place, and again after removing them. The Qflash button didn’t visibly cause anything to happen. Ever.
2. Tried starting with no GPU installed, using the MB HDMI output, and with the GPU installed, using HDMI output; multiple cables each way.
3. Unattaching and re-attaching all the power cables, making sure they are of the right type. All are from the Corsair PSU package.
4. Placing RAM modules in pairs and singly in each of the four sockets.
5. Resetting the motherboard by both removing the battery for 5 minutes and clearing the CMOS per the motherboard manual.
No lights come on on the MB, but all fans come on, and the GPU lights up. The optical drive spins and then stops. The network socket lights up amber when a cable is connected, and there is a brief flash of white from the MB (I think from where the RGB will eventually come from) when the case power is turned on. So I think the MB is getting power, but I don’t know if it’s malfunctioning.
In going back to the Gigabyte website, it appears that my exact RAM isn’t on the list. The closest match is: F4-3600C16D-16GVK. Pcpartpicker.com didn’t flag mine as incompatible, but I failed to research further than their matching algorithms.
I don't really have alternate hardware setups to try components in different cases, unfortunately.
I’ve built a lot of PCs over the years, but I’m definitely more enthusiast than expert. Every 7 years or so when its time to upgrade, I do enough research to get a parts list together, and then build, then forget about what’s cutting edge/current until the next cycle. I’ve never had a build just refuse to start up before, and I’m a bit stuck on how to go about diagnosing this. The point being, I am happy for any and all suggestions, given my general level of knowledge.