X399 Gaming Pro Carbon AC won't power on/POST

esandquis159202dc

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I have been using this motherboard with a Threadripper 1900x for several years. A couple months ago, reboots started hanging on codes 33 and 66. It never failed to boot though, just took a long time to move past those codes. After a reboot the other day, the power button lit up, but if I tried to boot I heard a click... Nothing else... No boot, no POST, no other LEDS other than the power button on the MB and the OC dial. I figured the PS died, so I replaced it. No change. I figured the MB died, so I got a new one. Same problem. Could the CPU have died and caused this? I have tried removing RAM. I have removed and swapped video cards. I have USB video adapters too for additional monitors. I pulled all of those as well. disconnected HD and CD. Nothing.
 
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esandquis159202dc

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Today, I removed the Radeon FE card, and installed a new ASUS Dual GeForce RTX 4070 White OC Edition. I also moved the ram from where I had them to the manuals recommended slots. I aso replaced one of the CPU power cables with a new one - as the previous one had an extension, and the new PS had a long one I could replace that one with. So, both CPU and the PCI power sockets are in use. The PS is Themaltake toughpower GF A3 1050. Still nothing.
 

esandquis159202dc

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At this point I can't even look at a new proc because other than the preboot static power, nothing is powering up. If I go to a new cpu, it will likely be a 2970wx or a 2990wx, and that will require a bios upgrade. right now I am not even getting the system test leds in the corner near the CPUpump power. I am stumped at this point...
The only leds that are on on the MB is the power and the OC dial. No other Leds are not, not even the EZ Debug Leds.

ideas????
 
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esandquis159202dc

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So, in another thread, someone suggested plastic standoffs for the MB as the metal ones could be creating a short. I am not sure how that could be, seeing that it was working for years. New MB on the same standoffs. but I'll give it a shot before I replace the CPU.
 

esandquis159202dc

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So... New MB, new CPU, new Video card, and new PS. Power light comes on. Press on the MB or on the chassis. There is a click, and nothing else happens... I just feel like I am missing something... Unless the new PS I have is actually bad...

Incidentally, this is the same behavior as the previous MB/PS/CPU/GPU... Tested on another circuit, in case there was a bad neutral on the line
Posted in the ThermalTake Community forum as well... Bad PS from the vendor? I suppose it is possible...
 
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alfabet15ed02f3

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If you have changed everything it has to be the common element: the chasis. Have you tried to make to make it working outside of it? You can turn it on by makeing a shortcut on the power on jumper on the MOBO.
 

Alan J T

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So... New MB, new CPU, new Video card, and new PS. Power light comes on. Press on the MB or on the chassis. There is a click, and nothing else happens... I just feel like I am missing something... Unless the new PS I have is actually bad...

Incidentally, this is the same behavior as the previous MB/PS/CPU/GPU... Tested on another circuit, in case there was a bad neutral on the line
Posted in the ThermalTake Community forum as well... Bad PS from the vendor? I suppose it is possible...
OK so you need to remove and remount the CPU some times you can get some stretching of the mounting system

remove the cooler and remount the CPU using the Correct procedure for the TR I believe it is some kind of Tork driver you get with the CPU or Motherboard and remount your cooler making sure to use very even pressure
 

esandquis159202dc

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Well.. I got it to power up... It appears the PCI-E cable to the MB from the power supply was bad. I replaced it with another, and I now have power... Stuck at post code 90 at the moment... Trying to swap video cards, because I have no video output at the moment... So, still don't know what is going on...
 

esandquis159202dc

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I'm thinking that the MB has stock bios. I will need to find an older card to boot from. My new card is a GeForce RTX-4070 OC. I doubt it will come up on the AMD Vega-FE either... I need to find something older, get the bios updated, then install the new card. We shall see.. Hopeful I didn't waste money either replacing the MB/CPU with what I had verses a newer release that had listed support...
 
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