x370 SLI BIOS upgrade to 4.5. No Post now.
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=7804
Printed Date: 19 Jul 2025 at 6:59am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: x370 SLI BIOS upgrade to 4.5. No Post now.
Posted By: busyuqboy
Subject: x370 SLI BIOS upgrade to 4.5. No Post now.
Date Posted: 24 Feb 2018 at 1:16pm
" rel="nofollow - I had a windows 10 installation working on an X370 SLI motherboard. I updated the bios using usb stick and instant flash to version 4.5. After the update, I pressed the 'enter' key to restart. The computer never gets past the BIOS post screen. The ASRock logo is on the screen and the options are listed in the bottom right corner but none of the keystrokes work. The logo stays and won't boot to Windows anymore. I have removed video card (to go back to just on board vga). I have cleared CMOS a few times. I have allowed it to sit for an hour...still stays on the BIOS post screen. I can press ctrl-alt-delete and the computer will cycle. Any help or suggestions would be appreciated.
Is there a way to downgrade the bios? I don't need to use the latest version. Version 3.5 was working just fine. But if I can't get into the bios setup...how will I flash the bios?
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Replies:
Posted By: wardog
Date Posted: 24 Feb 2018 at 1:53pm
" rel="nofollow - What BIOS rev did you upgrade to 4.50 from?
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Posted By: busyuqboy
Date Posted: 24 Feb 2018 at 9:27pm
Posted By: busyuqboy
Date Posted: 27 Feb 2018 at 1:44pm
" rel="nofollow - So I am dead in the water for days now. Any ideas on how to get the x370 Killer SLI motherboard to boot with v4.5 BIOS? Still won't get past the BIOS post (ASRock logo).
If there is no way to fix this BIOS issue, how can I return the motherboard? I've owned it for less than a month.
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Posted By: wardog
Date Posted: 27 Feb 2018 at 2:05pm
Being less than 30 days, return or exchange it from the reseller.
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Posted By: busyuqboy
Date Posted: 27 Feb 2018 at 4:23pm
Posted By: deskok
Date Posted: 28 Feb 2018 at 6:05pm
" rel="nofollow - I am having problem after upgradethe bios to 3.5, not even 4.5 yet.
The Mobo keep rebooting by itself every 10 second, can't even see the ASROCK word
How to roll back? Help please.
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des
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Posted By: MisterJ
Date Posted: 01 Mar 2018 at 2:26am
" rel="nofollow - deskok, what method did you use for updating BIOS/UEFI? If you used Windows, then it may be a bad flash. You should use only Instant Flash. I would suggest you flash to 3.5 again using Instant Flash. Enjoy, John.
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