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Designjet T1300 Error 79.2:04 on startup

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Designjet T1300

Printer will initialize to 26%  then hang up and eventually give error 79.2:04. I have restarted the printer and left it unplugged overnight multiple times to not change, and attempting to start and access diagnostic mode has the same result.


I have tried rebooting with the ink cartridges and paper removed, but cannot access the print heads as the carriage is currently under the right side cover, once I find a T-15 screwdriver I'm going to get at it to try removing them.


I have also attempted a boot mode firmware update (using a 128GB USB 3.0 Flash drive, maybe too big?) which hung up around 86% during the system file check.


Anyone have any suggestions for next steps? 

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The plotter cannot access to diag mode . can you share with me the key combination? you used and about the printheads, it's the same issue without it? because the solution can be an EEROM Reset.

I am an HP Employee.
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