BIOS update won't boot

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   I updated the BIOS for my Asrock b450 pro 4 to version 4.50 today and my pc will not boot. I was updating the bios to get my ram to run at the advertised speed. When I try to boot the fans and light turn on for about 10 seconds and then stop for a second and then tun back on over and over. Does anyone know how I can get my computer to boot?
My pc:
Ryzen 5 3600
1650 super
asrock b450 pro 4
16 gb g.skill ripjaws v 3200mhz

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Matthewb21499 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 21 Dec 2020 Status: Offline Points: 4	Post Options Post Reply Quote Matthewb21499 Report Post Thanks(0) Quote Reply Topic: BIOS update won't boot Posted: 21 Dec 2020 at 9:16am
	I updated the BIOS for my Asrock b450 pro 4 to version 4.50 today and my pc will not boot. I was updating the bios to get my ram to run at the advertised speed. When I try to boot the fans and light turn on for about 10 seconds and then stop for a second and then tun back on over and over. Does anyone know how I can get my computer to boot? My pc: Ryzen 5 3600 1650 super asrock b450 pro 4 16 gb g.skill ripjaws v 3200mhz

ThreeDee Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 24 Jul 2019 Location: Billings,MT Status: Offline Points: 2396	Post Options Post Reply Quote ThreeDee Report Post Thanks(0) Quote Reply Posted: 22 Dec 2020 at 6:57pm
	unplug power and then hit and hold power button for a few seconds to discharge all residual power from your setup .. clear cmos and pull one stick of RAM out leaving only 1 stick in the A2 slot. Power back on and see if it boots up. If it does, flash back to v. 4.20. If it doesn't ..swap RAM sticks and try again. On the 2 x570 motherboards I have .. the newer BIOS's with Ryzen 3000 series .. RAM speeds/capability have been horrid/worse
	\|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\|

Matthewb21499 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 21 Dec 2020 Status: Offline Points: 4	Post Options Post Reply Quote Matthewb21499 Report Post Thanks(0) Quote Reply Posted: 23 Dec 2020 at 2:28am
	I tried booting up with 1 stick of ram after clearing the cos and it didn't boot. How do I flash back to v. 4.20.?

ThreeDee Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 24 Jul 2019 Location: Billings,MT Status: Offline Points: 2396	Post Options Post Reply Quote ThreeDee Report Post Thanks(0) Quote Reply Posted: 23 Dec 2020 at 10:13am
	Unfortunately, you have get it to boot first before you can flash back with your motherboard. Perhaps unplug the power and remove the CMOS battery and let it sit over night and then put the battery back in, plug power back to it and then see if it fires up. That has worked for others in the past
	\|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\|