Ubox 6600H won’t power on after shutdown unless unplug replug

[Notpierre]

Hello everyone,

I just bought a Chuwi UBox with a Ryzen 5 6600H, 16GB DDR5 and a 512GB NVMe SSD.

I have a serious problem with power management:

• When I shut down (in Windows 11 and Ubuntu), the machine shuts down correctly (the power light turns off).

• But when I press the power button to turn it back on, the LED lights up but nothing happens: no display, no BIOS/GRUB, just a black screen.

• The only way to restart it is to physically unplug the power adapter and plug it back in. Then it boots normally and I can see GRUB/Windows booting.

This therefore does not seem to be linked to the operating system (same behavior under Windows and Linux). This looks like a BIOS/firmware or hardware issue.

Has anyone else with the UBox experienced the same problem?

Is there a BIOS update or workaround? Or should I just return the device under warranty?

Thanks in advance for any help

[bruzan2025]

Hello.

@Notpierre

When I shut down (in Windows 11 and Ubuntu

The same thing happened before installing Ubuntu.

@Notpierre

This therefore does not seem to be linked to the operating system (same behavior under Windows and Linux). This looks like a BIOS/firmware or hardware issue.

You can check all the cables and connectors, it may be a false contact.

@Notpierre

Or should I just return the device under warranty?

You can ask where you bought it.