I managed to grab a Maximus XII Hero on amazon warehouse for $160 Well, this is the first red flag. I'm going to guess the reason it was returned, and the reason it was sold for 1/3 retail pricing, is that it never worked in the first place. Also, Z490 requires a BIOS update to run 11th gen, which I'm guess is another issue that needs addressed first. Answer from -UserRemoved- on reddit.com
Asus
rog-forum.asus.com › t5 › z370-z390 › rog-maximus-x-hero-q-code-quot-40-quot-always-show-at-the-mobo-7 › td-p › 766799
ROG Maximus X Hero Q-Code "40" Always Show at the ... - Republic of Gamers Forum - 766799
March 7, 2024 - Windows 10 with fast boot enabled loads from "cache" on the disk making it faster. Qcode 40 is letting you know that the computer woke from hibernated state or what it thinks was hibernated.
Reddit
reddit.com › r/buildapc › asus q code 40, no video out from gpu. 11 hours on this and i'm exhausted :(
r/buildapc on Reddit: Asus Q Code 40, no video out from GPU. 11 hours on this and I'm exhausted :(
August 4, 2021 -
Hey! So this is probably my last case resort before I start tearing the system apart and completely rebuilding it with a new motherboard. I recently picked up the bestbuy ASUS 3080 pc and decided to transplant the components with existing components from a ryzen 5, 580x build of mine (ram and psu into a new case, cooler, and motherboard. I managed to grab a Maximus XII Hero on amazon warehouse for $160 so I centered the build around that and it came pretty much brand new.
Now to what's been making me feel so defeated: I spent about 11 hours disassembling both PCs and building two of them again. However when I tried booting up the PC that I was planning on using as my main driver, it boots and cycles to asus post code 40 (which has something to do with waking from crashing) however nothing appears on my monitor. I replaced the 3080 with a 3060ti that I planned to put in the other PC for my brother to test if it was a video card issue, however the same issue persisted. All fans spin, no weird noises, and there's just no visual.
Does anyone know what's up? In the worst case scenario my motherboard is DOA which would be tragic. However I'm hopeful that this just has something to do with a BIOS update incompatibility due to the lack of either 11th gen support on this z490 chipset (although from my research there shouldn't be) or something to do with the 3080/3060ti being PCIE 4.0 in a PCIE 3.0 slot? Does anyone have any ideas for things I can try out outside of just replacing the motherboard?
Things I plan to try:
-
Removing ram sticks
-
Updating bios(?) no idea how since I can't get into BIOS
-
Trying the old RX580
-
Last resort, replacing the motherboard (I don't have any more thermal paste or sticky washers from arctic, so I'll have to figure out how to get more.)
Thank you so much for taking the time to read this, I'm sad and angry at myself for not testing on the bench before putting everything together and honestly just want something to display so I can work.
PCPartPicker Part List
| Type | Item | Price |
|---|---|---|
| CPU | Intel Core i7-11700KF 3.6 GHz 8-Core Processor | $529.99 @ Amazon |
| CPU Cooler | ARCTIC Liquid Freezer II 360 A-RGB 48.8 CFM Liquid CPU Cooler | Purchased For $140.00 |
| Motherboard | Asus ROG MAXIMUS XII HERO (WI-FI) ATX LGA1200 Motherboard | Purchased For $160.00 |
| Memory | Crucial Ballistix Sport AT 32 GB (4 x 8 GB) DDR4-3200 CL16 Memory | Purchased For $120.00 |
| Storage | Western Digital Blue SN550 500 GB M.2-2280 NVME Solid State Drive | $59.99 @ Newegg |
| Storage | Crucial MX500 1 TB M.2-2280 Solid State Drive | $114.99 @ Adorama |
| Video Card | Asus GeForce RTX 3080 10 GB TUF GAMING Video Card | $900.00 |
| Case | be quiet! Pure Base 500DX ATX Mid Tower Case | Purchased For $79.99 |
| Power Supply | Thermaltake Toughpower Grand RGB 750 W 80+ Gold Certified Fully Modular ATX Power Supply | Purchased For $60.00 |
| Prices include shipping, taxes, rebates, and discounts | ||
| Total | $2164.96 | |
| Generated by PCPartPicker 2021-08-04 10:23 EDT-0400 |
Q code 40 HELP - Republic of Gamers Forum - 587360
BTW the system doesn't ever make it to a point where it looks like windows is loading. Also I am 100% certain the code says 40 not anything else. I am overclocked on CPU and Memory running ASUS crosshair V forumla-Z AMD FX 6350 (slightly overclocked to 4.0 gh) Radeon HD 7750 G. More on rog-forum.asus.com
ASUS Maximus VI Formula Q-Code 40? - Republic of Gamers Forum - 434043
Not sure why but I either get the Q-code AO or I get 40. My setup is a ASUS Maximus VI Formula, i7 4770K, Corsair Vengeance Pro 16GB 2133Mhz and a ASUS R9 290. I think that when I get the Q-Code 40, my computer would sometimes blue screen or crash.. Everything is on stock settings. More on rog-forum.asus.com
Asus X99-A Q-Code 40 sometimes - PCPartPicker
I have the mobo Asus X99-A and sometimes it boots with AA and sometimes 40 ?why i know q code 40 means somethings not right but im not sure how to fix it More on pcpartpicker.com
Q code 40 ? - Republic of Gamers Forum - 593138
But Q code read 40. I restarted and all is fine, Q code is now AA. Anyone know what would cause that? ... Check the manual - I believe it is a code for waking from a sleep state. Page 1-33 · ASUS Rampage V Extreme BIOS 4101 | i7-6950X | Thermaltake Core X9 | G.Skill F4-2800C16Q-32GRK | Cooler ... More on rog-forum.asus.com
Videos
Top answer 1 of 4
1
Don't know if this has been resolved yet, but Asus Q-Code 40 means your PC has awoken from S4 sleep. What happens is in Windows 8/8.1 a feature called Fast Startup is on by default, it works by saving system info to a file upon shutdown so when you start your PC again, Windows uses that system info to resume your PC instead of restarting it.
To disable this, right click your start menu and go to Power Options, then select Choose what the Power button does, then under Shutdown settings you can disable Fast Startup. Also, disable Fast Boot in your BIOS as well, it will be in the boot section.
2 of 4
1
Sorry to bring this post back from the dead but I'd like to know if there's any actual advantage from having Fast Boot enabled in BIOS as well has Fast Startup on Windows Power Options! Thanks in advance :D
Asus
rog-forum.asus.com › t5 › other-motherboards › q-code-40-help › td-p › 587360
Q code 40 HELP - Republic of Gamers Forum - 587360
March 6, 2024 - Arne Saknussemm wrote: Codes 30 and 40 are shown waking from various sleep states Maybe instability waking from sleep/hibernation Hello This. ^^ Q-Code 40 is resuming from the S4 Hybrid state.
ASUS
asus.com › support › faq › 1043948
[Motherboard] Common Q-CODE(Error CODE) and Troubleshooting | Official Support | ASUS Global
Method a: Check for the Q-Code on the Motherboard, which is usually on the left upper edge or lower edge of the motherboard, as shown in the picture below: Method b. Enter into · ASUS Official website , open the Product Spec Page and check if your model support ASUS Q-CODE in Specifications
Linus Tech Tips
linustechtips.com › computer hardware › cpus, motherboards, and memory
I have an issue with Q-code 40 always display on mobo - CPUs, Motherboards, and Memory - Linus Tech Tips
November 14, 2017 - Hi, I just build a new rig few days ago. What im facing now is an issue that Q-code always showing 40 on my Asus Strix x399 E-Gaming motherboard. My last rig used to showed Q-code AO on the motherboard and i think that is normal but now im facing the Q-code 40 and sometimes Q-code AA. I do lot of...
Asus
rog-forum.asus.com › t5 › other-motherboards › asus-maximus-vi-formula-q-code-40 › td-p › 434043
ASUS Maximus VI Formula Q-Code 40? - Republic of Gamers Forum - 434043
March 6, 2024 - Nate152 wrote: Hello IBIubbleTea, code AO means your pc is working properly, code 40 means your pc has awakened from the S4 sleep state. I don't have my computer in sleep, it was a cold boot.
YouTube
youtube.com › watch
Asus Motherboards (Q-code 40 fix) - YouTube
I changed the title of the video because the feedback I have got is saying most if not all Asus motherboards have the same issue.Quick video showing how to f...
Published October 10, 2015
PCPartPicker
pcpartpicker.com › forums › topic › 142061-asus-x99-a-q-code-40-sometimes
Asus X99-A Q-Code 40 sometimes - PCPartPicker
40 Q-Code: Pc was booted / boosted via a Windows controlled method (Usually from deep sleep, restart, Hibernation etc)
XDA Developers
xda-developers.com › home › other hardware › the most commonly seen q-code errors on asus motherboards, and how to fix them
The most commonly seen Q-Code errors on Asus motherboards, and how to fix them
February 22, 2024 - It's more of a status indicator than an error code LED, and you may notice it cycling through a bunch of rapidly changing codes before it settles on one as your PC finally boots. Simply buying an Asus motherboard with a Q-code LED isn't enough, as it's equally important to know what they mean and how you can troubleshoot based on the code that's showing up on the motherboard.
Asus
rog-forum.asus.com › t5 › x99 › q-code-40 › td-p › 593138
Q code 40 ? - Republic of Gamers Forum - 593138
March 6, 2024 - But Q code read 40. I restarted and all is fine, Q code is now AA. Anyone know what would cause that? ... Check the manual - I believe it is a code for waking from a sleep state. Page 1-33 · ASUS Rampage V Extreme BIOS 4101 | i7-6950X | Thermaltake Core X9 | G.Skill F4-2800C16Q-32GRK | Cooler ...
Microsoft Support
support.microsoft.com › en-us › topic › error-codes-in-device-manager-in-windows-524e9e89-4dee-8883-0afa-6bca0456324e
Error codes in Device Manager in Windows - Microsoft Support
Windows cannot access this hardware because its service key information in the registry is missing or recorded incorrectly. (Code 40)
Asus
rog-forum.asus.com › t5 › amd-500-400-series › q-code-40-x570-e-gaming › td-p › 845356
Q Code 40 x570 e gaming - Republic of Gamers Forum - 845356
March 6, 2024 - I turned it off, so now it only shows during Post, which is how it should be and the code is gone. Thanks for that. ... [Motherboard]Fix FPS Game Launch Errors: Enable Secure Boot and Update TPM 2.0 (fTPM) on Windows PCs in FAQs (Motherboards) 3 weeks ago · ROG Strix X570-E Gaming in AMD 500 & 400 Series 09-26-2025 · Bifurcation for X570 Dark Hero? in AMD 500 & 400 Series 09-14-2025 · X570 E-Gaming not booting in AMD 500 & 400 Series 09-09-2025 · Asus Rog Strix x870e-e gaming Stopped working all of a sudden !!!
Asus
rog-forum.asus.com › t5 › overclocking-tweaking › the-40-q-code-is-freezing-some-programs › td-p › 296105
The 40 Q-Code is freezing some programs... - Republic of Gamers Forum - 296105
March 6, 2024 - When I start my pc in the morning (E.G), windows starts normally but my Origin Client and other software doesn't start, does not work!!! ... When I come to the mainboard Q-Code LED, it shows 40. I need to restart my PC to obtain AA Q-Code to access to previews freezed software and work in windows ...
Linus Tech Tips
linustechtips.com › the workbench › troubleshooting
ASUS Maximus VIII q-code 40 - Troubleshooting - Linus Tech Tips
October 28, 2018 - I built my system a few years ago and some days I am able to play games uninterrupted but on other days the system crashes and the q-code on the motherboard is 40. I tried looking around online for a solution to the problem but there isn't anything that directly correlates to my situation. Based ...
Asus
rog-forum.asus.com › t5 › x99 › q-code-40 › td-p › 554283
Q-Code 40 - Republic of Gamers Forum - 554283
March 6, 2024 - Hello It is in the manual. Q-Code 40 is wake from S4 sleep.
Asus
rog-forum.asus.com › t5 › other-motherboards › rampage-iv-black-edition-q-code-40 › td-p › 421783
Rampage IV Black Edition Q code 40 - Republic of Gamers Forum - 421783
March 6, 2024 - Q code 40 is not hardware issue, it has something to do with windows 8 power shut down and resume.
Quora
quora.com › How-do-I-Fix-ASUS-Motherboard-Error-Code-40
How to Fix ASUS Motherboard Error Code 40 - Quora
Answer: The motherboard is the core factor that holds your computer’s components. So if the motherboard gets an error, everything falls apart. Asus error code 40 is a very common one. The error generally relates to the Asus motherboard issues which stop your device from functioning normally. ...
Facebook
facebook.com › groups › ASUSPCDIY › posts › 4278781815538206
PC booting at 40 code after sleep state
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Asus
rog-forum.asus.com › t5 › intel-700-600-series › 690-formula-error-q-code-00-amp-40 › td-p › 896630
690 Formula Error Q-code 00 & 40 - Republic of Gamers Forum - 896630
March 7, 2024 - HI, When we built the pc i got the error code 00 i didn't realise it was a error code,. I though it meant everything was ok. i only realised when i got the error code 40 which meant it was booting to fast, so i fixed the problem by turning of ...