AMD Motherboards - B450 pro4 AC Power On Function is useless

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B450 pro4 AC Power On Function is useless

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=15818
Printed Date: 14 Aug 2025 at 12:24pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: B450 pro4 AC Power On Function is useless

Posted By: PunchLine
Subject: B450 pro4 AC Power On Function is useless
Date Posted: 04 Sep 2020 at 2:04pm

Dear forum member,

I have already set AC POWER Loss to always on in BIOS FCH Common Options page.
However, PC is not able to turn on after power supply is turned on.
Could someone please advise about it? The BIOS I use is 1.30

Replies:

Posted By: ASRock_TSD
Date Posted: 04 Sep 2020 at 3:53pm

Dear PunchLine,

Greetings, this is ASRock TSD.

Regarding your question, the solution has been included since BIOS P3.20 version.
Please update BIOS to P3.20 or later version and then make it to work again.
http://www.asrock.com/MB/AMD/B450%20Pro4/index.asp#BIOS

Thanks!

All the best,
ASRock TSD

Posted By: PunchLine
Date Posted: 04 Sep 2020 at 3:59pm

Thanks and it works. Good ASROCK