Printer blinking red and showing letter E - HP DeskJet F380 All-In-One Printer

Error description:

The Attention (red) light is blinking. There are six possible causes that will display the Attention light pattern:

-Paper out
-Door open
-Print cartridge missing
-Paper jam
-Paper sensor jammed
-Duplexer error

Solution :
After the cause of the problem has been addressed, pressing GO will cause the printer to attempt to recover from the cause of the error. If the printer is unsuccessful, it will continue to display the Attention message until the cause is remedied.

Pressing JOB CANCEL will cancel the print job and the printer will return to the Ready state (Ready light on) unless there is a paper jam still in the printer or the print cartridge is not in the printer.

For more details visit the link below :

Resolve Printer issue