HP P2015dn dropped off network

[redcow]

The flashing light should be on solid.
If the printer is near a PC, take the network cable from the PC and plug it in the printer. See if the light goes solid on.

You may have a bad Jet Direct. Which means Formatter.
Interesting observation...can't find the formatter listed in the parts list!!
FW defect
Print a config page. Press and hold the Go button ~5 secs. The LEDs will flash. Release the button. A config page will print. Look at the product information block. Look for the Firmware Date Code. If it reads 2XX70813 order a formatter.
If the code is 20070810 go to http:// www.hp.com/pond/firmware/hidden/p2015FWUpg20070810.html and flash the firmware. The 2XX70813 is non flashable