What to do when the Epson L850 printer keeps flashing all the lights? First you need to know what error your Epson L850 Printer is showing, for this it's simple, print something and check the error message that appears on your computer or notebook screen, let's go to the steps 1 - Print something anything and check the message that appears on the monitor status 3 EPSONĢ - Check if the message that appears is ink pad, or the end of its useful life of some component internal. Reset Epson L850 is by mistake of the printing pad or a component at the end of the life of the L850 printer, it is caused by a security system installed by the manufacturer to prevent possible damage to the L850 printer.