how to fix u0100 code

Howell Hishousy · Monday, November 8, 2021

04-17-201811:19 PM #1

ROG Junior Member Array

How to fix CPU CODE: 00 ?

Hi team,
I recently built x4 identical PC's with the specs outlined below. They all worked fine for about two months until yesterday when one of then started showing the error code "CPU CODE: 00" on the motherboard. So 3 out of 4 PCs work without issues, however, only one displays this error. Nothing shows on screen when I boot the computer up. All PC's are running at their default settings, no over clocking of any components.

I have tried / checked the following and the error still occurs. I was wondering if there is anything else that I could try before sending the motherboard and CPU back for a replacement.

What I have tried:
1) unplug components one by one and restart ( RAM, hard drive, DVD drive, graphics card, wires from the case etc.)
2) remove motherboard completely from the case to see if there is a short circuit.
3) remove the CPU to see if there are any bent pins - none as far as I could see.
4) Clear CMOS both via the button and also by removing the CMOS battery for a few minutes.
5) Switched LN2 Mode on/off.

SPECS:
CPU: Intel i7-7820X
Motherboard: ASUS ROG RAMPAGE VI EXTREME
Graphics: Asus PH-GTX1050-2G nVidia GeForce GTX 1050 2GB GDDR5
Memory: G.Skill F4-2400C15Q-32GRR QUAD CHANNEL: 32GB (4x8GB) DDR4 2400MHz [Ripjaws4] 1.2V
Hard Disk: Samsung 860 PRO SSD: 1TB
04-18-201805:50 AM #2

Tech Marketing Manager HQ Array

Od that it would happen out of the blue. Check with a different PSU.
04-18-201807:33 PM #3

New ROGer Array

Had the same issue on my formula turned out that my h100i's pump was on its way out and didnt give the readings like it should so the mobo refused to start.....
I replaced cooler and all was fine again
Sent from my SM-J500F using Tapatalk
04-19-201803:37 AM #4

ROG Junior Member Array

Originally Posted by Raja@ASUS

Od that it would happen out of the blue. Check with a different PSU.

Sorry, forgot to mention PSU in specs before. The PSU's in all 4 PC's mentioned above is:
CORSAIR TX650
I tried with another CORSAIR TX650 and still get thte CODE:00 error.

I understand that this PSU is no on the qualified vendors list for this motherboard...
http://dlcdnet.asus.com/pub/ASUS/mb/...192.1521087619.

...so I tested it again with one that is, on the list:
EVGA SuperNova-750-G3 750W

I know only the ...G2 version of the EVGA PSU is on the QVL above but I assumed if version G2 is ok, G3 would be too.

So, In summary, I still get the error for two different CORSAIR TX 650 PSU's and for the EVGA SuperNova-750-G3 750W
04-19-201803:42 AM #5

ROG Junior Member Array

Originally Posted by Madr0X

Had the same issue on my formula turned out that my h100i's pump was on its way out and didnt give the readings like it should so the mobo refused to start.....
I replaced cooler and all was fine again

Sent from my SM-J500F using Tapatalk

I am using air cooling for the CPU:
Noctua NH-U12S CPU Cooler
The graphics card is also air-cooled.

04-19-201803:58 AM #6

Nate152 está en línea ahora

Moderator Array Nate152 PC Specs

Nate152 PC Specs
Motherboard	ROG Maximus IX Code
Processor	i7-7700k 5.2GHz Delidded
Memory (part number)	16GB G.Skill Trident Z 4025MHz 17-17-17-39-2T
Graphics Card #1	Titan Xp - EKFC waterblock
Graphics Card #2	Titan Xp
Sound Card	ROG SupremeFX 2015
Monitor	HP ZR30w
Storage #1	Toshiba VX500 256GB
CPU Cooler	Swiftech Apogee GTZ
Case	Thermaltake Armor+ VH6000
Power Supply	PCP&C Turbo Cool 1200w
Keyboard	Cyberpower Skorpion K2
Mouse	ROG Chakram Core
Headset	Sennheiser HD6XX / Modmic 5
Mouse Pad	Steelseries QCK Prism XL
OS	Windows 10 Home 64 bit
Accessory #1	Asus optical drive
Accessory #2	Koolance ERM-2K3U

Nate152's Avatar

Hi mjman8935
I don't have your board but most of the time code 00 is caused by three things, a faulty psu, motherboard or cpu. Testing with three psu's I think we can rule out the psu.

There are other things that can cause code 00 like bent cpu socket pins, corrupt bios, failed memory training.

Try updating/reflashing the bios via the bios flashback method. If that doesn't bring it to life, swap cpu's with one of your other pc's.

Last edited by Nate152; 04-19-2018 at 04:33 AM.

04-19-201802:25 PM #7

MirceaForce no está en línea

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MirceaForce PC Specs
Motherboard	ASUS RAMPAGE VI EXTREME OMEGA
Processor	Intel� Core i9-7920X Processor Extreme Edition 4.2 GHZ auto
Memory (part number)	G.SKILL 32GB 14-14-14-34 [Trident Z RGB] F4-3200C14Q-32GTZR
Graphics Card #1	NVIDIA GEFORCE GTX 1070 Founders Edition
Graphics Card #2	Samsung SSD 850 EVO 2TB
Graphics Card #3	Samsung SSD 850 PRO 2TB
Sound Card	Sound Blaster Z
Monitor	IPS LED LG 27" 27UD69P 27 inch 4K 5 ms WhiteFreeSync - disabled, Display port
Storage #1	Samsung 950 PRO M.2 512GB OS
Storage #2	Samsung SSD 850 EVO 2TB
CPU Cooler	CORSAIR Hydro Series H80i v2
Case	Cooler Master: HAF X
Power Supply	Seasonic PRIME Titanium 850w
Keyboard	normal usb benq
Mouse	Razer Taipan
Headset/Speakers	Logitech Z-5500 digital
OS	Windows 10 x64 Pro up to date
Network Router	:Intel� Ethernet Server Adapter I210
Accessory #1	LG OLED55C8PLA

MirceaForce's Avatar

Originally Posted by Nate152

Hi mjman8935

I don't have your board but most of the time code 00 is caused by three things, a faulty psu, motherboard or cpu. Testing with three psu's I think we can rule out the psu.

There are other things that can cause code 00 like bent cpu socket pins, corrupt bios, failed memory training.

Try updating/reflashing the bios via the bios flashback method. If that doesn't bring it to life, swap cpu's with one of your other pc's.

dead cpu

04-21-201812:24 AM #8

ROG Junior Member Array

Originally Posted by Nate152

Hi mjman8935

I don't have your board but most of the time code 00 is caused by three things, a faulty psu, motherboard or cpu. Testing with three psu's I think we can rule out the psu.

There are other things that can cause code 00 like bent cpu socket pins, corrupt bios, failed memory training.

Try updating/reflashing the bios via the bios flashback method. If that doesn't bring it to life, swap cpu's with one of your other pc's.

Thanks for the suggestions.
I tried updating the bios again but still get the error.

I have also tried swapping the CPU from one of the computers that worked. For clarification, the PC's tested are called:
MJ-PC: everything works fine.
SC-PC: reports the above mentioned CPU CODE: 00 error.

I put the just the CPU from SC-PC into the motherboard of MJ-PC. I didn't put cooling in and unplugged all hard disks. I didn't see the CPU CODE: 00 error. I saw a few other errors (VGA- CPU with different codes) but I assume that was because I didn't put the cooling in. The point being that it I did not see CPU code: 00 error with SC-PC's CPU in MJ-PC's motherboard.

I put the CPU from MJ-PC into the motherboard of SC-PC and I get the error CPU CODE:00 again.

So, in summary, when swapping CPU's, I still see the error CPU CODE: 00 on SC-PC which, based on the above comments mean that the motherboard must be faulty or there is a bent pin and I cannot see it?

04-21-201807:30 PM #9

Nate152 está en línea ahora

Moderator Array Nate152 PC Specs

Nate152 PC Specs
Motherboard	ROG Maximus IX Code
Processor	i7-7700k 5.2GHz Delidded
Memory (part number)	16GB G.Skill Trident Z 4025MHz 17-17-17-39-2T
Graphics Card #1	Titan Xp - EKFC waterblock
Graphics Card #2	Titan Xp
Sound Card	ROG SupremeFX 2015
Monitor	HP ZR30w
Storage #1	Toshiba VX500 256GB
CPU Cooler	Swiftech Apogee GTZ
Case	Thermaltake Armor+ VH6000
Power Supply	PCP&C Turbo Cool 1200w
Keyboard	Cyberpower Skorpion K2
Mouse	ROG Chakram Core
Headset	Sennheiser HD6XX / Modmic 5
Mouse Pad	Steelseries QCK Prism XL
OS	Windows 10 Home 64 bit
Accessory #1	Asus optical drive
Accessory #2	Koolance ERM-2K3U

Nate152's Avatar

Since it died on you out of the blue I don't think you have bent socket pins but it seems you do have a faulty motherboard.

Last edited by Nate152; 04-21-2018 at 07:32 PM.

03-10-201910:09 AM #10

Morlock no está en línea

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Morlock PC Specs
Motherboard	Asus R5E10
Processor	I7-5960X
Memory (part number)	DDR4 8x8Gb, 3200CL16
Graphics Card #1	MSI GTX 1080Ti Gaming X 11G
Sound Card	Asus SupremeFX Hi-Fi
Monitor	BENQ GW2470
Storage #1	System - Samsung SM961; Game - Goodram Iridium Pro 240Gb
Storage #2	HDD - SB ST2000DM001
CPU Cooler	Noctua NH-D14
Power Supply	EVGA SuperNOVA 1300 G2, 80+ GOLD
Keyboard	Logitech G19 Gaming USB
Mouse	Logitech G502 Hero
Mouse Pad	Razer Goliathus
Headset/Speakers	Onkyo TX-8050, Amphiton 25AS-027, AKG 240 Pro
OS	Windows 10 Pro x64 2004
Network Router	TP-Link 841nr

Morlock's Avatar

Originally Posted by Nate152

Since it died on you out of the blue I don't think you have bent socket pins but it seems you do have a faulty motherboard.

I now have a motherboard (Asus Rampage V Edition 10) on the table. Post code 00. The processor is removed from the slot, no element consumes from 1.8v vrm. In this case, the resistance on the power of the processor is zero. Zero, short circuit. And not a single burnout place. Everything is new. At the same time, empirically, it was found out that DrMOS are OK. The whole problem is somewhere in the environment, most likely the culprit will be a capacitor: either tantalum or ceramics, although it may well be that the electrolyte. There is no closure in the socket, the state is new.