Boot menu not working properly

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   Pressing F11 on my new Z490M-ITX/ac with i5-10400 processor at startup results in the bootable devices not being populated. I had Amazon replace the motherboard. The replacement worked flawlessly for a week, then started malfunctioning. Some EFI bootable flash drive show as they should, others now don't. To use them, I have to enter setup and change the boot order. If I just have a single SSD with Windows 10 or Linux Mint attached, the boot menu shows no bootable device. All the above is with UEFI installs and CSM disabled. If I enable CSM the boot menu works. I've tried reflashing the BIOS 1.30 and 1.20 and the Beta L1.32. It makes no difference. I tried jumpering the board. I tried different SATA cables, power supply, and many other components. The previous board a Z90M-ITX/ac never did this. I've used ASrock motherboards for years and never an issue. 

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LanceM Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 29 Dec 2020 Location: Idaho Status: Offline Points: 6	Post Options Post Reply Quote LanceM Report Post Thanks(0) Quote Reply Topic: Boot menu not working properly Posted: 29 Dec 2020 at 6:37am
	Pressing F11 on my new Z490M-ITX/ac with i5-10400 processor at startup results in the bootable devices not being populated. I had Amazon replace the motherboard. The replacement worked flawlessly for a week, then started malfunctioning. Some EFI bootable flash drive show as they should, others now don't. To use them, I have to enter setup and change the boot order. If I just have a single SSD with Windows 10 or Linux Mint attached, the boot menu shows no bootable device. All the above is with UEFI installs and CSM disabled. If I enable CSM the boot menu works. I've tried reflashing the BIOS 1.30 and 1.20 and the Beta L1.32. It makes no difference. I tried jumpering the board. I tried different SATA cables, power supply, and many other components. The previous board a Z90M-ITX/ac never did this. I've used ASrock motherboards for years and never an issue.

LanceM Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 29 Dec 2020 Location: Idaho Status: Offline Points: 6	Post Options Post Reply Quote LanceM Report Post Thanks(0) Quote Reply Posted: 30 Dec 2020 at 5:53am
	I solved it myself using the free trial of https://www.easyuefi.com/index-us.html There was a Hidden boot item in the firmware, and deleting it, fixed it. If only, I'd of known, I would not have needed to return the first one to Amazon. Sure seems like ASrock tech would of known. I wonder if thee's a way to do it in the BIOS with some key combination?

LanceM Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 29 Dec 2020 Location: Idaho Status: Offline Points: 6	Post Options Post Reply Quote LanceM Report Post Thanks(0) Quote Reply Posted: 30 Dec 2020 at 5:54am
	I solved it myself using the free trial of EasyUEFI There was a Hidden boot item in the firmware, and deleting it, fixed it. If only, I'd of known, I would not have needed to return the first one to Amazon. Sure seems like ASrock tech would of known. I wonder if thee's a way to do it in the BIOS with some key combination?

LanceM Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 29 Dec 2020 Location: Idaho Status: Offline Points: 6	Post Options Post Reply Quote LanceM Report Post Thanks(0) Quote Reply Posted: 06 Jan 2021 at 7:07am
	Linux users can do it with efibootmgr Show entries with this command efibootmgr -v To identify any that need deleted, Use blkid to compare the UUID of the EFI and delete all others. To remove the respective boot entry: sudo efibootmgr -b <bootnum> -B Example: sudo efibootmgr -b 0014 -B