Question PC only boots upon fresh start

[TimboSlice98]

I recently attempted to upgrade my system, which required a BIOS update. Post-update, I was unable to boot and consistently received the message "Please select a bootable device". I noticed that by manually selecting the Windows Boot Manager in the Boot Menu, Windows would boot normally. Eventually, I discovered that setting the boot mode exclusively to UEFI allowed for normal booting. However, I'm still encountering an issue: after rebooting, the system boots into the BIOS and fails to display any hard drives or the Windows Boot Manager in the Boot Menu/Boot Order. Essentially, the system only launches Windows on a fresh boot. If I restart the system, either through Windows or from the BIOS, it boots into the BIOS without showing any hard drives.

What could be causing this behavior? I've also tried disabling fast boot, but it had no effect.

CPU: Ryzen 5 2600X
CPU cooler: Stock
Motherboard: Asus TUF B450-Plus Gaming (BIOS 4401)
Ram: HyperX Fury 16GB 2666MHz
SSD/HDD: 240GB M.2 PCIe SSD Kingston A1000, 1000GB Seagate Toshiba/WD SATA
GPU: Asus Dual-GTX 1070-O8G, 8GB DDR5
PSU: Enermax Marblebron 750 Watt (used 2 days or so)
OS: Windows 10
Monitor: Some random TV

 

[Lutfij]

Welcome to the forums, newcomer!

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

 

[rickypicky5]

Please list the components that were "upgraded".
Old component - New component

 

[TimboSlice98]

I reinstalled the old hardware because the PC wouldn't boot at all after the upgrade. I think the problem was the bios version.
I wanted to replace:

Ryzen 5 2600X -> Ryzen 5 5600X
GTX 1070 -> RX 6750XT

But I reinstalled the old parts and updated the BIOS first. That was when the problems started.

 

[rickypicky5]

You may need to Clear CMOS. Follow the instructions, steps 1 through 4, on top of page 1-4 "Clear RTC RAM" of your User's Manual.