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Corsair AX1200i not posting


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I have a Corsair AX1200i that is several years old.

Motherboard don't post on my new system(see my specs) with this PSU connected but another Corsair 750W PSU(a CX if I remember correctly) that my friend have works fine and my motherboard posts.

But as soon as I connect my AX1200i it refuse to post. (Error q-code 36)

I use this PSU in my old computer and it works, but exact same cables in my newer computer and it don't work. No post!

 

I saw the sticky but my PSUs lot code is not in the range so I cannot use that replacement form.

My PSU is older, so I think this error might affect much older lot codes as well!

 

I send an email to Corsair support about it including all info about my PSU.

 

I just wanted to write it on the forum as well for people searching for solution to same problem as me.

 

My serial number starts with 13 so I assume it was made in 2013!

Edited by ax1200i
Added info about my serial year
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the boot issue affects new HXi PSUs, not AXi, so it's a totally different problem. And the two models are completely different.

 

That said, if your PSU is from 2013, it's at the end of its tether. It could simply be that it's not as stable as it was brand new. Added load from new components and all that ?

Just guesses of course, but even if you get it to work, you should think about replacing it soon, more so if you plan on getting a new GPU

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the boot issue affects new HXi PSUs, not AXi, so it's a totally different problem. And the two models are completely different.

 

That said, if your PSU is from 2013, it's at the end of its tether. It could simply be that it's not as stable as it was brand new. Added load from new components and all that ?

Just guesses of course, but even if you get it to work, you should think about replacing it soon, more so if you plan on getting a new GPU

Omg I must be blind I'm sure I read AX1200i as well.. my bad!

 

But the problems seems to be very similar to the HX series problem starting newer hardware like x570 motherboards.

I been in contact with experts and they all scratch their head about this post problem. ASUS did not understand why the motherboard got the error 36 and did not post.

 

All other hardware are confirmed to work in either other computers systems or everything the same but a different PSU.

 

2013 is not old imo especially for a high tier PSU like a Corsair AXi and there is even 2-3 years left on the warranty.

There is no heavy load just posting a motherboard for a 1200W power supply, it's just a normal consumer PC, 1 cpu,1 motherboard and 1 gpu and no other hardware connected.

I even think my older CPU and motherboard probably draw more than this new one.

 

There must be some hardware/software bug happening. It's so strange.

Edited by ax1200i
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Just to make my situation more clear.

I posted this on the ASUS forums, it's most of the things I tried before testing to use another PSU.

I also want to mention that I been in contact with another guy on the ASUS forums that have the same motherboard, CPU and an AX1200i and he have the exact same problem as I have!

 

My ASUS ROG STRIX X570-E GAMING refuse to post.

I get this error on the Q-code "36 "CPU post-memory initialization. System Management Mode (SMM) initialization "
And white VGA LED shines on motherboard.

My specs.

CPU: AMD Ryzen 5900X
Motherboard: Asus ROG STRIX X570-E Gaming
RAM: G.Skill TridentZ F4-3600C17Q-64GTZSW (Compatible on QVL list for this motherboard)
GPU: ASUS ROG STRIX 1080Ti OC (Newest firmware and Nvidia DP 1.4 patch)
PSU: Corsair AX1200i

What I have tried to solve this problem.

* I have flashed ALL bios versions supporting 5000 series CPU using BIOS Flashback, several times with every hardware change like RAM. Flash process works, light blinks slow, then faster for a few minutes and goes out at the end.
Versions tested:
2606
2802
2812
2816
3001
3202
3402

*I have reseated CPU, RAM, GPU and all power cables hundreds of times.

*I have inspected every port possible on motherboard and all connections on hardware for dirt or damage with my 20X magnification glasses. Nothing found.
*Processor Pins are all in good condition, nothing bent.

*GPU and PSU works perfectly fine in my old computer that I use daily,

*I tested all possible RAM configurations with 1 stick, 2 sticks and all 4 sticks. And yes of course the recommended A2 B2 positions.
*I tested another set of RAM Corsair Vengeance LPX CMK64GX4M2E3200C16

*I reset BIOS many times by jumper on motherboard, by removing battery for hours.
*Tested to clear CMOS before BIOS flash.
*Tested to clear CMOS after BIOS flash.
*Tested to clear CMOS before and after BIOS flash before first attempt to power on.

*I tested another GPU that works in my old computer ASUS Geforce ENGTX 560Ti DCII TOP
*I tested GPU in all 3 PCI-E sockets.

*I tested using 3 different screens.
*I tested several different HDMI cables and DVI cables.

*I tested with all my drives, fans, USB ports connected.
*I tested with the bare minimum of 8Pin CPU, 24Pin Motherboard power, 2x 6Pin GPU power and GPU, 1 stick of RAM, CPU, 1Cpu fan and Power button connection to motherboard.

*Tested different cables on my PSU for GPU.

*I tested to not have any RAM at all, Got error 21. (Ram error)
*I tested to flash a BIOS that are old and don't support 5000 series. Got CPU error RED CPU LED.
*I tried many more tings that I forgot to mention, I'm totally out of ideas by long ago.
*I tried to remove the GPU, then it's the same error. Same if it's plugged in and if it's not. (GPU works in my old computer though)
*I even prayed to god for mercy.


Error is always the same. Stops on Q-code 36 and white VGA LED shines.
I tried to let it sit on that error for over 14 hours, noting happens.

When I power on the fans start, rgb on GPU lights up, looks very normal.
Motherboard flips through the qcodes, in the end it goes to these codes 36->39->36 and stops there and then GPU slows down and stop spinning, but RGB shines. (GPU fans don't spin in idle in windows btw only when under load or startup)

That Q-Code 39 that it flips too for a half a second is "Post-Memory North Bridge initialization (North Bridge module specific)"

So this is what I got:
"36" "CPU post-memory initialization. System Management Mode (SMM) initialization "
"39" "Post-Memory North Bridge initialization (North Bridge module specific)"

Seems to me there is a problem in the early post process once System Management Mode is initialized and once it have reserved it's RAM or something and then try to proceed with it's thing. Maybe get locked in itself and don't release hypervisor control back to BIOS/OS and freeze on 36?
CPU broken? Firmware Bug?
I'm not too familiar with this process so could be totally wrong here.

I contacted ASUS support, they said I had tried everything and that I should return the motherboard to seller.
I returned the motherboard to seller, they tested it with an 5800X CPU and unknown RAM,GPU,PSU and they got it to post and boot windows 10 and run Cinebench.
They also said they updated the Bios as I requested them to do. (In case BIOS flashback was corrupted somehow)

When board was returned to me, it was still the same error with my 5900X and my hardware.

Any ideas? I have been trying to solve this for about 2 months now.

Edited by ax1200i
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The only signal the PSU sends to the motherboard is the power good signal. But i believe if this one comes too quick or too late, the board just doesn't post at all.

Or maybe this signal is lost at some point? but that would be no bueno, because it would indicate either fried circuitry, or voltages dropping somewhere.

Hard to say without a scope anyway :/

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Is there any special setting in the corsair i-link that could maybe solve this issue with no boot on x570 motherboard?

I have never changed anything there, it should be running default.

 

What could really be wrong with my power supply to make a motherboard light up properly and start fans but not post?

 

 

I have bought a new Corsair HX850i PSU and will try that one, hopefully it will work. I will update what happens later this week.

Edited by ax1200i
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