HP LJ M425dn Load paper error

[jwrycza]

Is there a paper detect sensor on these models somewhere? I have one that lifts the paper to the feed roller but the panel still says to load paper. I did pull the front cover of the tray off and inserted it into the printer and the message went away for a few prints but, did happen again. I know the paper is raising but, the printer is not detecting that. There is a black lever that hangs to the right of the feed roller but, doesn't seem to be attached to any sensors that I can see. There is no theory of operation in the manual I have so, I do not know how it detects paper. Any help would be appreciated.

[ebulich]

Could be your paper tray and the tension in the springs. It may go up when you slide the tray up - but is there enoough tension to hold the paper firmly to the pick up rollers.

[jwrycza]

Could be your paper tray and the tension in the springs. It may go up when you slide the tray up - but is there enoough tension to hold the paper firmly to the pick up rollers.

I swapped the tray with a new one and it went to normal for a few seconds and then right back to the error. It has a new roller in it too. I see the paper coming all the way up. I just can't figure out what triggers the error.