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Reddit
reddit.com › r/asus › x99 w/code 99
r/ASUS on Reddit: X99 w/code 99
June 1, 2024 -

I have a code 99 on my Asus X99 A-II, most likely caused by a virus from using a Tzurk brand AIO LCD screen. (Same issue with my AMD pc as well). Both occurring on the same day. With no video output, I’m at a loss on how to rectify this problem. Additional details/specs can be provided. Any tips are greatly appreciated.

Top answer
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Qcode 99 is called Super IO Initialization. meaning anything connected to the board interface is somewhat not initializing. Could be from a bad hdd, or as simple as removing any USB connected from mobo before booting up. Remove everything, any usb interface (mouse, keyboard and such) anything that's connected to any usb header from mobo then just leave the main parts, fans, cpu(ofc) and gpu then try booting it up. Go on from there then if that doesn't work, reseat ram maybe also cpu or even gpu. Could also mean it needs bios update but start with the easiest troubleshoot first. The aio screen u have, that connect via USB on mobo, correct? If so try disconnecting it first then booting up. I'm not sure how you got a virus unless you downloaded something sketchy from the web. Can u also send me a link of the aio screen your talking about? I want to check that out. here's a link where people manage to fix this issue doing different things
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I guarantee that you did not get a virus from connecting an AIO. Also a virus would affect the operating system and you wouldn’t see its effect during post. That being said…Code 99 could mean a lot of things. I recently experienced this and it was simply the bios letting me know that there was change and it wanted me to press F1 to continue and enter the bios. The problem was that my monitor (Samsung Oled G9) doesn’t initialize right away and since the post was halted, I never saw the message. I spent days unplugging ram, video card, etc. And I finally I tried an old monitor and boom right on the screen…Press F1 to run setup.
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Tom's Hardware Forum
forums.tomshardware.com › home › cpus
[SOLVED] - Asus X99-A 00 Error Code | Tom's Hardware Forum
September 23, 2020 - I’ve done a search online and see a few people have had issues with this error code but I can’t seem to find any fixes apart from a CMOS reset. Any idea on what’s happened and what is needed to fix it? I’m assuming new mb and cpu but not quite sure why..... I’m also a bit wary that it could be the psu somehow but the fact that everything else starts makes me think this isn’t the case. Specs: Asus X99-A Motherboard i7 5820k OC to 4.2 Geforce1080ti Gpu Corsair 750W CS series 80 plus gold PSU Corsair Vengeance 16gb ddr4 ram 1Tb HDD 1TB Samsung 860 Evo Thanks in advance.
Discussions

Asus X99-A showing 00 Q Code [HELP] - PC Builds, Modding & Overclocking - TechEnclave
Hey, I have a PC I built in 2014 on the Asus X99-A motherboard. Over the years I’ve added a lot to it. Recently it just started showing issues and finally threw a “00” Qcode. Does anyone have experience troubleshooting this or was able/unable to get this fixed by themselves or by a ... More on techenclave.com
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0
January 7, 2025
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
🌐 pcpartpicker.com
Asus X99-A Error Code 03 VGA Light On
Hello, so basically I just turned off my PC after using it for maybe 4 hours or so and I just tried booting it up however I get no post screen is completely black. The Code sits at 03 and the VGA light is on. The code goes from 70 to 79 to 03 and stays at 03 PC specs - Intel Core i7-5820K Over... More on forums.tomshardware.com
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August 12, 2017
ASUS X99-A USB 3.1 00 Q-Code
Just finished building my new PC, ... happens: Error Code 00 CPU Fans ARE SPINNING (Corsair H100i GTX) Pump is running HDD & SSD are running GPU Fans ARE SPINNING but all the other fans do not spin (3 included ones), the system does not show anything on the screen and shows Q-Code 00 Specs: ASUS X99-A USB 3.1 ... More on forums.tomshardware.com
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31
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December 18, 2015
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ASUS
dlcdnets.asus.com › pub › ASUS › mb › Add-on_card › MB_Appendix_Template_RF_2G_5G_20180730.pdf pdf
ASUS X99-DELUXE II Series A-1 Appendix Appendix Appendix Q-Code table
Code · Description · 03 · System ... state · AC · System has transitioned into ACPI mode. Interrupt controller is in PIC mode. AA · System has transitioned into ACPI mode. Interrupt controller is in APIC mode. ASUS X99-DELUXE II Series ·...
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Overclock.net
overclock.net › home › forums › intel › intel motherboards
Asus X99-A 3.1 error code bF official help thread!!! | Overclock.net
October 19, 2016 - Okay so I recently had an issue with this code... and I'm sure most the people that have/had this code find it nearly impossible to find anything on the web that actually works. This thread is to hopefully help you out. (This is my first time doing something like that so correct me if I am...
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TechEnclave
techenclave.com › hardware & gaming › pc builds, modding & overclocking
Asus X99-A showing 00 Q Code [HELP] - PC Builds, Modding & Overclocking - TechEnclave
January 7, 2025 - Hey, I have a PC I built in 2014 on the Asus X99-A motherboard. Over the years I’ve added a lot to it. Recently it just started showing issues and finally threw a “00” Qcode. Does anyone have experience troubleshooting this or was able/unable to get this fixed by themselves or by a ...
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PCPartPicker
pcpartpicker.com › forums › topic › 142061-asus-x99-a-q-code-40-sometimes
Asus X99-A Q-Code 40 sometimes - PCPartPicker
Either way 40 or AA signify normal operation, so nothing to worry about with those two codes.
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ManualsLib
manualslib.com › brands › asus manuals › motherboard › x99-a › user manual
Q-Code Leds - Asus X99-A User Manual [Page 41] | ManualsLib
October 10, 2014 - The Q-Code LED design provides you with a 2-digit error code that displays the system status. Refer to the Q-Code table on the next page for details. Q-Code table Code Description Not used 00 microcode 02 CACHE_ENABLED 03 PCH initialization 04...
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Tom's Hardware Forum
forums.tomshardware.com › home › systems
Asus X99-A Error Code 03 VGA Light On | Tom's Hardware Forum
August 12, 2017 - Hello, so basically I just turned off my PC after using it for maybe 4 hours or so and I just tried booting it up however I get no post screen is completely black. The Code sits at 03 and the VGA light is on. The code goes from 70 to 79 to 03 and stays at 03 PC specs - Intel Core i7-5820K Over...
Find elsewhere
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Tom's Hardware Forum
forums.tomshardware.com › home › motherboards
ASUS X99-A USB 3.1 00 Q-Code | Tom's Hardware Forum
December 18, 2015 - Just finished building my new PC, ... happens: Error Code 00 CPU Fans ARE SPINNING (Corsair H100i GTX) Pump is running HDD & SSD are running GPU Fans ARE SPINNING but all the other fans do not spin (3 included ones), the system does not show anything on the screen and shows Q-Code 00 Specs: ASUS ...
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Tom's Hardware Forum
forums.tomshardware.com › home › motherboards
Asus X99 Deluxe "AA" code | Tom's Hardware Forum
July 29, 2015 - On my motherboard where I presume the temperatures are mean't to be, there is something replacing it called "AA", what does this code even mean?
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Tom's Hardware Forum
forums.tomshardware.com › home › motherboards
[SOLVED] - Asus X99-A II Code 00 | Tom's Hardware Forum
December 4, 2018 - Fans, gpu, ram also one other thing im not sure but the watercooling fans dont spin or light up thanks! ... Possibly , yes. Sometimes the CPU power connection stops functioning. It's like the socket doesn't sense the 8 pin is inserted and then it will show error 99.
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Reddit
reddit.com › r/asus › i have asus x99 motherboard, have 53 error code on board
I Have Asus x99 motherboard, have 53 error code on board : r/ASUS
May 6, 2024 - 127K subscribers in the ASUS community. A community for support, discussions, and recommendations related to ASUS. Welcome!
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Linus Tech Tips
linustechtips.com › computer hardware › cpus, motherboards, and memory
Asus X99 Deluxe code 00 - CPUs, Motherboards, and Memory - Linus Tech Tips
October 12, 2023 - By Crunchy Dragon September 4, 2023 in CPUs, Motherboards, and Memory · Share · https://linustechtips.com/topic/1529817-asus-x99-deluxe-code-00/ More sharing options... Followers 1 · Go to solution Solved by Shimejii, September 4, 2023 · X99 has a ton of issues with their BIOS chips failing, causing many issues.
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Reddit
reddit.com › r/asus › i have an 00 code on my x99-a/usb 3.1, is my mobo dead?
r/ASUS on Reddit: I have an 00 code on my x99-a/usb 3.1, is my mobo dead?
September 15, 2021 -

I've had startup issues the last two days, my computer wouldn't start the first few goes, then it would boot up and ask me to check bios settings, restored to default and it would work fine for the day.

The next day it just wouldn't start, I saw it was throwing up an 00 code, one of the suggested fixes was swapping round the RAM slots, I did so and it booted up into bios again - all settings at default and it started up and worked the whole day again.

Today it won't boot at all. I've tried swapping Ram slots again, replacing CMOS battery, can't get it to post. I'm way out of my depth, a friend said it was my CPU that had died, google searches tell me it could be my mobo or PSU as well. I need a little help, please!

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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:
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Reddit
reddit.com › r/buildapc › asus x99-a ii q-code b1 solved!!
r/buildapc on Reddit: ASUS X99-a II Q-code B1 solved!!
November 4, 2022 -

I was running into a scrapped X99 board that seemed to be perfectly functional, even accepting a BIOS update, but getting stuck on post code B1 with multiple cpus. (Code looks a lot like 61, so people get confused.) I've seen a ton of these that have failed, including online.

Today, I am glad to report that I have found a solution.

There is a bad soldering joint (from factory) on one of the power components on the memory detection line, which i've confirmed from three different boards (this may depend on which factory it was manufactured from) that seems to have been produced at similar times.

When this component loses continuity, the board simply cannot detect any memory, or gets stuck on B1. It knows the stick is there, which is why it doesn't get stuck at post code 53, but moves on to b1.

I'll update with photos later!

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Reddit
reddit.com › r/pcmasterrace › asus x99-a ii — q-code 00, bootloop, no error leds (even with no ram). corrupted bios?
r/pcmasterrace on Reddit: ASUS X99-A II — Q-Code 00, bootloop, no error LEDs (even with no RAM). Corrupted BIOS?
May 5, 2025 -

Hey everyone! I have an ASUS X99-A II motherboard that’s acting weird, and I’m trying to figure out if it’s savable or completely dead. I’ve done quite a bit of troubleshooting and would appreciate any advice or second opinions.

Symptoms: • Board goes into a bootloop but stays on for a few seconds before restarting. • Q-Code shown is 00, no matter what components are installed. • No diagnostic LEDs light up, not even with no RAM or no CPU. • CPU doesn’t warm up at all — seems like it’s never initialized. • No bent pins in the socket, PSU is brand new, RAM is tested and good. • Bought the board second-hand from a flea market, so the history is unknown.

Interesting detail: I attempted a BIOS Flashback, but I messed up the USB setup. Still, the board once booted without the loop (but with no display), and after a restart, it went back to the usual behavior: bootloop + Q-Code 00.

That makes me think the BIOS is partially corrupted. If the chipset was totally dead, I don’t think it would’ve reacted at all to the flashback. Based on how things behave, the BIOS seems to be the core problem — not the power delivery or chipset.

Questions: 1. Has anyone had this happen on an X99 board? 2. Can a completely corrupted BIOS cause these exact symptoms? 3. Should I try a proper USB Flashback or go straight to EEPROM flashing or buying a pre-programmed BIOS chip?

Thanks in advance for any advice! (Bonus: I’m only 13 and passionate about PC hardware, so even basic explanations are really appreciated.)

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ManualsLib
manualslib.com › brands › asus manuals › motherboard › x99-a ii › user manual
Asus X99-A II User Manual (Page 33 of 124) | ManualsLib
View and Download Asus X99-A II user manual online. X99-A II motherboard pdf manual download. Q-Code table Code Description 5A Internal CPU error 5B Reset PPI is not available 5C – 5F Reserved for future AMI error codes E0 S3 Resume is stared (S3 Resume PPI is called by the DXE IPL) E1...
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Overclockers UK
forums.overclockers.co.uk › hardware › motherboards
asus x99 deluxe and 00 code | Overclockers UK Forums
May 21, 2015 - Hi guys everything lights up Inc all on board status leds and case fans the codes range from 76 to 62 then 00 then reboots and does the same etc? Tested psu changed memory about and tested gfx card one good note it's now getting to the BIOS screen before reboots or freezes and shows 4 dims ...
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Reddit
reddit.com › r/techsupport › anyone knows what this code means on a asus x99 deluxe motherboard?
r/techsupport on Reddit: Anyone knows what this code means on a Asus X99 deluxe motherboard?
January 19, 2019 -

http://imgur.com/a/VGl6D8B

The leds all work... It does display 00's shortly after power on then cycles and stops at 9q...

Things I did:

Reseat gfx card, try booting with and without..

Unplugging/replugging all ssd's and drives and booting..

It nevers posts and no beeping. No screen output either...

Dead mobo??