AMD Motherboards - PC with B450M Pro4F won't work

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PC with B450M Pro4F won't work

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=15924
Printed Date: 11 May 2025 at 5:09pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: PC with B450M Pro4F won't work

Posted By: dazzerg
Subject: PC with B450M Pro4F won't work
Date Posted: 06 Sep 2020 at 8:59pm

I'm a first time builder; I just finished this yesterday:

ASRock B450M Pro4-F

AMD Ryzen 3 3300X

Galax GeForce GTX 1660

WD nvme SSD 500GB

Cooler Master E501L

All four fans (gpu fan, cpu fan and case fan) run when I turn it on, but I get no signal, no beeps, nothing to indicate anything is actually happening. Not only this but the whole thing turns off a restarts after about 15 seconds. When I remove the 4/8 pin power cable from the motherboard, the restarting problem disappears.

I don't think the restarting problem is a short but I could be wrong.

https://imgur.com/a/aZ1K6AF

Can anyone help me out please?

Replies:

Posted By: Reset
Date Posted: 07 Sep 2020 at 2:50pm

For the 3300x at least BIOS version P2.00 must be installed. Which one is in there with you?

https://www.asrock.com/MB/AMD/B450M%20Pro4-F/index.de.asp#CPU

If a smaller version is installed, please contact the seller. That they install the correct one.