BUT then at that instant the power goes dark!
Can you make this clear which one exactly has an issue with immediate power failure is that the Trezor device, or are you talking about your desktop PC?
If it's in your PC, it looks like a driver issue if that's the case, I think you need to uninstall the current Trezor driver and use Zadig software to install a driver for your Trezor.
The guide how to install it can be found here:
Trezor Suite doesn’t see my deviceOr if the issue occurs on the Trezor device itself? then possible it's a program issue try to update it's firmware first if not you might need to reflash it's firmware but this is a bit risky if you do this in a wrong way check the link below if it's a trezor one model.
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https://github.com/trezor/trezor-firmware/blob/main/docs/legacy/index.md