HP Laserjet Pro MFP M130a faint print

[Printer77]

Hi, i have HP Laserjet Pro MFP M130a and the problem is that sometimes left side of print or copy is pale. New drum and toner was put in, all contacts were checked, inside of printer was cleaned and whole printer is checked for missing parts.. Everything looks ok... It works for a few days and then it fades again..
The picture is attached.TapScanner 02-18-2021-10.18.pdf

[ninja_unmatched]

Check the transfer roller. Make sure it is even the best you can.... look at the springs see if they are worn.

If one side isn't pushing with right tension, it can cause that... replace

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