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B4 Error - Help me!

Mr.David
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Go to solution Solved by Semper,

ASRock has B4 listed as a USB device error.

Remove all peripherals, and determine if one of them is the cause, add them one by one until the error is reproduced, then check against a different port should you find the error.

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Hello!

 

I have an Asrock B450M pro4 with Ryzen 2600, 16 gigs of ram, rx590 and a 240gb a1000 kingston M.2 SSD.

Everything was OK until today when the PC didnt boot. The keyboard and mousepad didnt work. I moved the keyboard and It was good, with Windows + CTRL + Shift i could get to Windows. I updated my BIOS to the latest and done a CMOS restart(unplug the PC, REMOVE the battery and then put a jumper on cmos for 30 sec). 

I have B4 error. What should I do?

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  • Solution

ASRock has B4 listed as a USB device error.

Remove all peripherals, and determine if one of them is the cause, add them one by one until the error is reproduced, then check against a different port should you find the error.

~Remember to quote posts to continue support on your thread~
-Don't be this kind of person-

CPU:  AMD Ryzen 7 5800x | RAM: 2x16GB Crucial Ripjaws Z | Cooling: XSPC/EK/Bitspower loop | MOBO: Gigabyte x570 Aorus Master | PSU: Seasonic Prime 750 Titanium  

SSD: 250GB Samsung 980 PRO (OS) | 1TB Crucial MX500| 2TB Crucial P2 | Case: Phanteks Evolv X | GPU: EVGA GTX 1080 Ti FTW3 (with EK Block) | HDD: 1x Seagate Barracuda 2TB

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Solved. After the BIOS update and discard changes in BIOS.

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