Did you tried to flash the original image, then without rebooting, flash the SSL89J ? (Then only after insert the Japhar Sim).

On past tests, I seen that the DM800HDseV2 boxes weren't able to downgrade to the SSL88, perhaps then there is more, could fail to update to the SSL89 if it already has it in ?... seems the case with your description.

The DM800HDseV2 I have here, got the same as your first box, just needed any MAC and it worked converted to Japhar.

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