B550 Pro4 Wont Post/Boot
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=17668
Printed Date: 10 Aug 2025 at 2:44pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: B550 Pro4 Wont Post/Boot
Posted By: mydogboggs
Subject: B550 Pro4 Wont Post/Boot
Date Posted: 31 Dec 2020 at 3:13pm
MB: ASROCK B550 Pro4
CPU: Ryzen 9 5900X
Cooler: NZXT X63
GPU: Sapphire 6800XT
RAM: G. SKILL Trident Z Neo 64GB
HD: Samsung 970 EVO Plus SSD 1TB
PS: 850W 80 GOLD
All RGB lights and fans working. Using HDMI cable to the GPU HDMI input. System wont boot/post. Red light on both VGA and BOOT.
Any suggestions?
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Replies:
Posted By: ThreeDee
Date Posted: 31 Dec 2020 at 3:27pm
do you have the P1.20 BIOS installed on this motherboard? If not, then you'll need to borrow a 3000 series CPU to flash to version P1.20 for Ryzen 5000 series compatibility.
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|Ryzen 5 5900|ASRock X570 Taichi-BIOS 4.60|2x16GB HyperX Predator RGB 3200@3600 1:1 IF|ASRock RX 6700XT|2 x PCIe 4.0 M.2 Drives for OS & Games|850 WTT Seasonic 80+ Titanium PSU|Noctua NH-D15|
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Posted By: ThreeDee
Date Posted: 31 Dec 2020 at 3:28pm
...or a Ryzen 4000 series
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|Ryzen 5 5900|ASRock X570 Taichi-BIOS 4.60|2x16GB HyperX Predator RGB 3200@3600 1:1 IF|ASRock RX 6700XT|2 x PCIe 4.0 M.2 Drives for OS & Games|850 WTT Seasonic 80+ Titanium PSU|Noctua NH-D15|
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Posted By: mydogboggs
Date Posted: 01 Jan 2021 at 6:30am
The Bios is the original 1.0. I didnt expect to need a BIOS update as I thought buying a B550 would be compatible out of the box buy I guess I was wrong.
No I didnt have an older Ryzen or know anyone that has a one I can borrow.
Any other way to update the bios?
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Posted By: ThreeDee
Date Posted: 01 Jan 2021 at 12:59pm
maybe local PC shop or purchase a 3000 series CPU, flash .. and then send/take the CPU back ..
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|Ryzen 5 5900|ASRock X570 Taichi-BIOS 4.60|2x16GB HyperX Predator RGB 3200@3600 1:1 IF|ASRock RX 6700XT|2 x PCIe 4.0 M.2 Drives for OS & Games|850 WTT Seasonic 80+ Titanium PSU|Noctua NH-D15|
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