Hi,

I would be truly happy if anyone could help with this. I have a Dell Wyse 5070 Extended thin client and upgraded the bios to 1.32.0, downloaded from Dell’s support website.

After the upgrade, BIOS completely changed, and amber blinking started as in the video. According to the guide, the 3+3 blink is a ‘BIOS Recovery 1, Recovery Image not found, Type A’ error message. However, I think there is something wrong with the BIOS.

What I have tried:

I formatted the USB to FAT32, put Wyse_5070_1.0.4.exe, Wyse_5070_1.10.2.exe, Wyse_5070_1.32.0.exe on the root, one-by-one, and tried to boot several times with and without nvme. It didn’t work.
I wanted to flash the BIOS again. However, it freezes on “preparing one-time boot menu…” So I cannot access the BIOS flash tool.
I bought a USB keyboard and tried to enter BIOS recovery by pressing Ctrl+ESC. It did not work, and I ended up in EFI shell.
There is no “Boot mode” option in the BIOS to switch to legacy mode.
I have formatted a USB drive with MS-DOS and plugged it into USB 2.0 ports, so I can run the BIOS flash. It never boots on that USB. (Probably, the client is stuck in UEFI)
I bought another Dell Wyse 5070 (not extended) and installed Windows 10 LTSC 2019 on nvme, with all drivers installed. It freezes during booting with the Windows logo.
The client freezes when it starts to boot any kind of UEFI OS.
It even freezes when I ctrl+alt+del on EFI shell or BIOS screen.
I have bought another power adapter, thinking it might be a power issue. Nope, it did not resolve the issue.
The boot sequence menu never lists USBs.

I have been dealing with this for more than a week with searching. As a last resort, I am posting. I truly appreciate any help.

Blink: https://drive.google.com/file/d/1-1o3QL4HEBGU7xYiGIruktHH6qJ35WLg/view?usp=sharing

BIOS Screen: https://drive.google.com/file/d/1-LGkVKxbwbVsWccmIbMeHPVRz6fhTX5K/view?usp=sharing

One time Boot Menu: https://drive.google.com/file/d/1-1e2eKa35vhaJLw0KXHRKfMgNSmzD6Uc/view?usp=sharing

EFI Shell: https://drive.google.com/file/d/1-GzoMquH09vZfHn_hOZjJdQwtQmixBUl/view?usp=sharing

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