Flashforge Inventor II fail


I've been asked to look at a Flashforge Inventor ii. I has zero files on internal storage and displays zero available.

I did the factory reset and there was no change. The internal storage is still full.

Aside from that, there are a couple more repeatable failure modes.

1. Firmware updates via PC software, USB and Wifi all fail with 'network/file failure'.

2. Sending files to the printer still fails with 'network/file failure.;

3. Preheat the extruder hits 220C and stops there.

I've reseated all the connectors on the main board.

Is there a secret diagnostic boot sequence? Is there a way to get more information from the printer?

Thank you.


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