AMD Motherboards - B450 Pro4 not booting with USB plugged in

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B450 Pro4 not booting with USB plugged in

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=13464
Printed Date: 30 May 2024 at 7:51pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: B450 Pro4 not booting with USB plugged in

Posted By: Torbi
Subject: B450 Pro4 not booting with USB plugged in
Date Posted: 18 Jan 2020 at 5:01am

Component:
B450 Pro4 (3.90)
Amd Ryzen 3600 (Stock Cooler)
Corsair Vengeance LPX 16GB (2x8GB) (CMK16GX4M2B3200C16)
Palit GTX 960 4GB
700 Watt be quiet! System Power S6 (PSU)

Hey guys, i need help before i return my (maybe faulty) B450 Pro4.
I checked every connection twice and built PC's at my job, so yes everything is plugged in the right way.
Everytime my keyboard or anything else is connected to the USB-Ports it wont boot. CPU-Fan, PSU-Fan, and Graphicscard-Fan spins but not the Case-Fans.
I cant power off while holding the power button and the beeper says nothing.
If i unplugg the USB devices it starts up normaly.
So is my B450 Pro4 faulty? Should i return it or is there a fix (maybe comming).
Any BIOS settings that could fix my problems?

Thanks in advance :)