Hi,
Are the printer lights flashing together or alternatively (one after the other)? Also are any other lights flashing?
Usually, lights flashing means:
1) Paper light on or flashing: printer out of paper, paper jam
2) Ink light on or flashing: printer out of ink, ink tanks need refilling etc
3) Paper and ink lights flashing together (as well as other lights possibly flashing): scanner error, printer error - turn printer on/off, if it doesn't go away it may have to be repaired/serviced or replaced
4) Paper and ink lights flashing alternately (one after the other - also other lights may flash): parts inside your printer are at the end of their service life, can be fixed for about £/€/$10 with a self-service, see this similar question: My epson L220 printer : ink and paper red light blinking alternately
Hope this helps
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