Blinking lights on Deskjet 5740

My HP Deskjet 5740 has just started blinking ALL of the lights at the same time...very fast. I tried the restarting idea, but that didn't solve the problem. Suggestions?

Hi,
Follow these steps for the exact blink pattern:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00169535&tmp_track_link=ot_faqs/top_issues/en_u...
If the Power, Resume, and Print Cartridge Status lights are blinking and restarting the printer did not cause any change, it will require to service the printer or might be the time for a new one.
Shlomi
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