Chuwi Hi10 Pro won't turn on after plugging it into the original keyboard

my (dear and old) Chuwi Hi10 Pro no longer turns on after plugging it into its original keyboard. The battery is not completely discharged because when I connect the keyboard the white LEDs of the keyboard turn on (even if only for a few seconds).

To check that the tablet was receiving power while charging, I used a power bank that remains on and discharges, but the orange light of the tablet does not turn on,

Considering that the problem arose after using it with the keyboard, could it have arisen precisely because of the keyboard or could it just be a coincidence? If this is a known and already solved problem, could someone help me?

Thanks in advance for your attention.

Best regards!