But after a Windows 10 update over the weekend, the M521dn went rogue.
Users would send a 20-page report, and the printer would wake up, whir, warm its fuser… then do nothing. The job would vanish from the queue. No error. No paper jam. Just silent defiance. hp laserjet mfp m521dn driver
She downloaded the latest firmware (2020.03.22) from HP — but you can’t update firmware over USB if the driver is broken. Classic chicken-and-egg. But after a Windows 10 update over the