Reset not working

My Meural Canvas II (model MC315GDW) lost power during boot.

Since then it no longer starts.

Current behavior:

• Meural logo appears

• screen then turns black

• device never completes boot

I have already performed:

• full power drain

• long power-button restart

• hardware reset using the rear reset pin

No change.

This strongly suggests the system/boot partition is corrupted.

Is there any rescue for the device?