Thank you very much!
Our initial problem was, that the HDD drive from our MSM765zl module had a fault and is not working anymore. We tried resetting it with a new HDD, after which the module did not boot at all, probably because there is nothing on the drive. Booting/flashing from a USB drive is therefore not working either, due to the missing OS.
Has anyone any suggestions, on how to boot the module correctly again? Do we need a special image for the boot process?
Thank you very much for your help so far!