You weren't in preboot if you see the green line. That's the unit attempting to go into Mass Storage Mode. If you wait too long in preboot before flashing or let go of the screen it will do that. I assume the unit didn't actually go to MSM and was still not recognised by your PC or you'd have said so.

Try again with the original command for region 41 backup, following the step-by-step i posted. Ensure that in update.txt you have no spaces before, after or within the command and no carriage returns either. Copy and paste this if not sure, but check that you paste it properly with no space or return as i said:
rrgn,41,1:/41_backup.bin
reboot

Ensure last_id.bin is deleted from 0972 folder too.