Meta Quest 3 Boot Problems

Hello,

Since a couple of weeks I have problems with my META Quest 3 Headset.

It started shutting off during use, unpredictadely.
At some point it didn't start up anymore. I have been trying ever since to find a solution for this issue. 

I tried a software update through connection to the PC from the META website, but the headset is not recognised.
I tried the power button for 30s.
I tried the power button with the volume button and a reboot, also the return to factory settings.
Nothing works.

The device powers up to the META logo, then usually a bright light flash and then the device starts to reboot going through the same steps logo, sound, flash and shutdown.

Does anyone know how to resolve this issue?

I still think it is software related.

Kindly
Anke