If I understood right, I have just checked hinges (
HP LaserJet Pro 400 MFP M425dn ADF Hinge, Genuine (J8802) ) and everything is ok. It was replaced to new by warranty 1 year ago. The previous was broken. Visually there are no any problems inside the ADF, but copies still skew. Do you have service manual how to dissemble ADF and checked rollers inside the ADF (latest rollers pulling the paper.) Firstly, I will try to dissemble ADF and after replace the spare parts. I hope the problem will be fixed.
Thank you.
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