There's no way to enter preboot when the device has a non-responsive screen [i'd missed that point sorry]. It may be permanently hard-bricked. We can try to flash 2077 firmware by SD, it might work. This involves trying to use the original 2077 boot.bin as Ldr.bin in a 1947 folder but if it doesn't work it may even make it less recoverable. Do you want to try?