ab350 pro 4 impossible to turn off csm
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=44815
Printed Date: 01 Jul 2024 at 2:05am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: ab350 pro 4 impossible to turn off csm
Posted By: hamburgler901
Subject: ab350 pro 4 impossible to turn off csm
Date Posted: 24 Jun 2024 at 10:16am
| I recently had an incident where I turned off my computer while it was starting up (possibly updating?) which caused me to be unable to boot to windows anymore. I originally installed windows 10 but had upgraded to 11. After trying a few different things I decided to just reinstall Windows. This turned out to not be so easy as I kept seeing a bluescreen when booting from my installation usb. I tried windows 10 and 11. In the end I was forced to use csm mode. Is there any way to get csm off to work on this motherboard ? I'm on bios L8.02 with a ryzen 7 1700. Thanks |
Replies:
Posted By: hamburgler901
Date Posted: 25 Jun 2024 at 11:12pm
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I used diskpart and 'list disk' to determine my bootable usb was mbr. I had used windows media creation tool. It makes sense to me that a mbr bootable media would not work with csm off. Next I used rufus to create a new bootable usb with GPT. GPT should work with UEFI. With csm off, I still get a bluescreen winload.efi error when trying to boot from the install media. |
Posted By: hamburgler901
Date Posted: 26 Jun 2024 at 5:26am
| I finally got this to work by reflashing the bios. I had tried clearing cmos previously and it didn't help. |
Posted By: Xaltar
Date Posted: 26 Jun 2024 at 11:23pm
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Thanks for the update and for sharing your fix hamburgler901. A BIOS reflash can sometimes resolve gremlins though I would always use it as a last resort unless your board supports BIOS flashback, I mention this for anyone else reading this post in the future. If you have a BIOS flashback option then there is no harm in trying it but if you do not, always approach BIOS flashing with caution, a bad flash will brick a board and cause all kinds of hassle returning/fixing it. Thanks again  ------------- 
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