HP M1522nf Multifunction, and the 49 error.

Today we encountered a HP M1522nf Multifunction printer, scanner, copier which was experiencing a 49 error during its power up.

The unit would start up fine, finish its initialization procedure, and about 5 seconds later would issue a 49 error, power off and on, and then reset itself and start the whole thing over again.

I was a bit perplexed on this issue. When referencing the service manual for the printer, it only referred to powering the unit off for 30 seconds, and then powering it back on to see if that would clear the error.

Of course it didn't.

For the follow up, it suggested calling HP service. Usually the service manuals will give you an indication for what parts to swap in an attempt to diagnose the unit. Thinking the formatter was the most likely culprit, I called HP, and they did verify that the problem was most likely the formatter.

However, while on the phone with a HP technician, I noticed that the top bezel that covers the buttons (the bezels are replaceable for the different languages) was not sitting correctly in place. I removed and re-seated the bezel, and the unit is working fine.

It seems the bezel was pushing some of the buttons on the front panel during power up, causing the unit to perform a reset every time it powered up, and then it continued to attempt to reset the unit during its POST procedures.

Hope this can help someone out there. Not the usual repair, but it does make for happy customers, when you can repair a unit in a hour and return it to the customer!

Thanks for reading, and have a great day!