[SOLVED] Threadripper boot loop without POST ?

[Daykono]

Hi,

I assembled a PC last May 2020 and it has been working perfectly till Jan the 6th 2021 when in the middle of my work the computer started resetting in a loop and it has been unable to POST since then.

PC SETUP :

• AMD Ryzen Threadripper 3960x CPU
• CoolerMaster ML360RGB AIO CPU cooler pump
• MSI Creator TRX40 motherboard
• 256GB 8x32GB DDR4 Corsair Vengeance LPX
• 2xMSI 2080Ti TRIO 11GB GPUs
• 2xSAMSUNG EVO970+ 1TB
• PSU EVGA 1600p2 Supernova 80plus)

Since that day I have been troubleshooting with both the motherboard and PSU manufacturers and after doing all the tests described below I have to come to this place for further support since CPU is the last component in my PC to be tested. At this point I seriously think there must be some problem with the CPU, something I fail to understand since I didn´t change anything in the computer before the outage. I have run the following tests:

• I have reseated all components in my PC including DIMMs, cooler, motherboard and CPU. I have done this in 2 complete different motherboards.
• I have placed DIMMs in all possible slots and combinations according to the motherboard manual. I am now only working with 1 DIMM in the recommended slot
• I have successfully flashed BIOs with latest driver and 2 other older versions several times from the USB flash button since I cannot enter in the BIOS menu
• I Disconnected the CMOS battery for 1 hour and I have cleared CMOS many other times using both jumper and on-board button
• I have removed all non essential components and cables from the motherboard and I have neither drive nor GPUs attached (plugging a GPU changes nothing). All connectors from motherboard to the box are unplugged. I only keep the 2 8 pin CPU power connectors, the CPU fan, the pump fan and the ATX power connector plugged into the motherboard
• I replaced my motherboard MSI TRX40 creator by an ASUS zenith II extreme Alfa and the result is exactly the same boot loop sequence: 00 b4 3E b8 82 14 15 C8 CC C0 C8 C4 E1 F6 EA 11 15 F5 07 04 33 99 33 60 90 C2 79 89 and restarts again
• The motherboard leds light on and off in a sequence from Memmory to CPU and VGA and then memmory again and POST is never sucessful.

The only thing I could not test further is the CPU since I don´t have a TRX4 threadripper backup

Any advice would be much appreciated

Thank you,

 

[Daykono]

I replaced the PSU and the result is the same

Any ideas??

 

[mdd1963]

If the results are the same with two mainboards, I'd say it's time to consult with AMD on their warranty coverage for a $1400+ CPU......

(NOTE: when you replaced the PSU, did the modular cables go with it? Please...Do NOT mix/match them unless you are 100% positive it was an identical model...)

 

[Daykono]

I used the cables coming with the new Psu which was a complete different model BTW. I didn't mix anything. I have contacted AMD but no answer yet for the last 3 days. Any advice to get their attention?

 

[Daykono]

I used the cables coming with the new Psu which was a complete different model BTW. I didn't mix anything. I have contacted AMD but no answer yet for the last 3 days. Any advice to get their attention?

Well, last Tuesday I received the confirmation from AMD that RMA was received, accepted and a replacement shipped to me. Yesterday I received another mail with the tracking number. Let's see how it works when I receive the new part.


Keep you guys posted

 

[Daykono]

Dear all,

the issue has been solved. AMD shipped back to me a new processor 6 days after RMA application and it works just fine.

So, it was the CPU. Mistery solved!

Now the only thing I would like to know is how a perfectly working CPU turned damaged without any intervention, no overclocking, no power outage. I was just saving a file and the computer died. So weird

Cheers and thank you all for your help!