E460 invalid firmware
Make sure you're using the correct firmware. First, get the base code version of your printer. Just print a menu settings page from your printer: Menu > Reports > Menu Settings Page > Get the Base code.
Once you have the base code, go to http://bit.ly/biqa0o and use this keycode to download the correct firmware for your printer: e460fb
That firmware if for these code versions:
Base: LR.MN.P510
Kernel: FPR.APS.F348
Network: NR.APS.N528
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