5900X / B550 -- DoA?

[Snoo19331]

I now own PC of this particular configuration:

PCPartPicker Part List

Type	Item	Price
CPU	AMD Ryzen 9 5900X 3.7 GHz 12-Core Processor
CPU Cooler	Noctua NH-D15 CHROMAX.BLACK 82.52 CFM CPU Cooler	$109.95 @ Amazon
Motherboard	MSI MPG B550 GAMING CARBON WIFI ATX AM4 Motherboard	$219.99 @ Amazon
Memory	Kingston HyperX Predator 32 GB (2 x 16 GB) DDR4-3600 CL17 Memory	$265.64 @ Amazon
Storage	Samsung 970 EVO Plus 2 TB M.2-2280 NVME Solid State Drive	$319.99 @ B&H
Video Card	KFA2 GeForce GTX 1050 Ti 4 GB OC Video Card
Case	Phanteks Eclipse P500A D-RGB ATX Mid Tower Case	$149.98 @ Newegg
Power Supply	Fractal Design Ion+ 760 W 80+ Platinum Certified Fully Modular ATX Power Supply	$134.98 @ Newegg
	Prices include shipping, taxes, rebates, and discounts
	Total	$1200.53
	Generated by PCPartPicker 2021-03-21 20:12 EDT-0400

And cannot track down the issue that prevents me from booting this PC. So far, I've never even seen it entering into BIOS.

1. I've been constantly getting CPU Debug LED indication, and re-flashing / resetting BIOS doesn't appear to help either.

2. A weird behavior of fans is spotted -- one of the front fans appear to not spin, instead it loosely twitches as if there's not enough power, other ones are working as expected

What I have tried:

- turning it on without RAM, getting CPU/DRAM indication shimmering repeatedly, after a few seconds it stopped at DRAM

- any possible combinations of RAM (different sticks, different slots), no drives except NVMe connected -- stuck at CPU LED

- re-attaching CPU, GPU

 

Is there a way to distinguish whether the motherboard or CPU has failed?

[bellabichon]

Have you updated the BIOS to a version that supports Zen 3 processors? The board should have USB BIOS flashback functionality. Here's a video showing how to update on the Gaming Edge, but the process should be identical.

[Snoo19331]

8 minutes ago, bellabichon said:

Have you updated the BIOS to a version that supports Zen 3 processors? The board should have USB BIOS flashback functionality. Here's a video showing how to update on the Gaming Edge, but the process should be identical.

Yes, I have. In fact, I did this before assembling it first time -- the version I flashed was 7C90v15 with AGESA 1.2.0.0, and I followed the process step-by-step, as shown in the video.

[bellabichon]

2 minutes ago, Snoo19331 said:

Yes, I have. In fact, I did this before assembling it first time -- the version I flashed was 7C90v15 with AGESA 1.2.0.0, and I followed the process step-by-step, as shown in the video.

Is there any way you could get the CPU tested, at a PC shop for example? Just to determine which part you would need to be RMA-ing. 

[Snoo19331]

4 minutes ago, bellabichon said:

Is there any way you could get the CPU tested, at a PC shop for example? Just to determine which part you would need to be RMA-ing. 

Not in the near future I believe, I have expected that additional information about fans or DRAM LED would reveal something. What I thought that if it's detected that RAM is no longer present and CPU LED doesn't light, then motherboard is at fault.

 

I guess I'll be following RMA procedure then.

[JasperNuijten]

Do you maybe have a different CPU to test the board?

[Snoo19331]

13 hours ago, bellabichon said:

Is there any way you could get the CPU tested, at a PC shop for example? Just to determine which part you would need to be RMA-ing. 

 

5 hours ago, JasperNuijten said:

Do you maybe have a different CPU to test the board?

 

I connected PSU to another PC and received approximately 20-25 short beeps, it cannot start properly. Now I'm leaning towards PSU -- and I have already sent my motherboard and CPU for analysis. What should I be doing next? My old, decrepit PSU used to work with old PC but I got rid of it shortly after.

[Snoo19331]

On 3/22/2021 at 3:32 AM, bellabichon said:

Is there any way you could get the CPU tested, at a PC shop for example? Just to determine which part you would need to be RMA-ing. 

 

On 3/22/2021 at 11:33 AM, JasperNuijten said:

Do you maybe have a different CPU to test the board?

Thanks everyone, it turned out that CPU was dead on arrival.