Scanner "Calibrating": Please revise your scanner designs

[lordthistle2]

I have a Laserjet M125nw, that, all of a sudden, started refusing to scan documents.

When the problem occurred, I had not moved the printer, actually I had not used it for weeks. The message on the LCD screen said "Calibrating", then nothing happened: no other messages were shown, no scan was done, the printer just went back to normal waiting for something to do. But the "scanner" was running: when turning on the printer, the scanner made all the initializing stuff: the light went on, the head moved from one side to the other and back.

Trying to understand the cause of the error, I have found a plethora of help requests concerning the same error for multiple HP MFP printers. It is so common that it seems a programmed/designed failure. Most of the questions received useless answers concerning firmware update, printer reset and all the usual nonsense replies from below-par helpdesk services.

One youtube video suggested to open the scanner (top part of the printer), disconnect the sensor, "move" the dust (even if you do not see any) and reattach everything. I tried it and it worked! Now my M125nw scans again. The funny part is that now I can see dust: alhough I was very careful where and how I placed the pieces, some dust made its way into the scanner.

This is clearly a very bad design, an incredibly bad design: "ONE" dust particle entering the sealed scanner on top of the printer, makes the scanner useless. Furthermore, the printer just says "calibrating" without adding any information about the causes of the failure (even in the logs that I accessed via the built-in web server).

Please HP, you can do better than this.

[Nal_NR]

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