Perform a Forced Hardware Reset of the System Kernel

1. Connect your device to a wall outlet using a USB-PD compliant charger (15W-30W) and allow it to charge for at least 30 minutes to ensure sufficient power for the boot process.

2. Disconnect the charging cable once the time has elapsed.

3. Press and hold the Power button firmly for a continuous duration of 30 seconds to force a hard power cycle of the system kernel.

4. If the device remains unresponsive, press and hold the Power button and the Volume Down button simultaneously for 7 to 15 seconds.

5. Observe the display for the Google 'G' boot logo, which indicates the system kernel has successfully re-initialized and the display driver has resumed function.

Sources