After some difficulty, I finally found the solution. The board of the Dp was short-circuited due to the incorrect positioning of a spring in the sheet inserting plate. It was upside down and touching the connector
(sorry for the translation)
Screenshot_20220427-170646_Xodo Docs.jpg
The wrong position
20220216_151041.jpg
The good position
20220216_151058.jpg
(sorry for the translation)
Screenshot_20220427-170646_Xodo Docs.jpg
The wrong position
20220216_151041.jpg
The good position
20220216_151058.jpg
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