Dell Venue 11 Pro No Bootable Device Found

Please please help

I have the Dell Venue with error no bootable device found.

I have tried the whole f2 advanced boot options then switching between legacy and uefi and also ran a full test on tablet and it said there was no issues. I found these on youtube as im a novice.

The battery has broken in past few days and tablet only works if its plugged in (if this is a hint for anyone)

Any help would be unbelievably appreciated!