Hp printer light blinks continously

[kalashrikant]

I have a printer hp photosmart all-in-one c5288 when power button on all button bkinks continiously and display shows unknown error try off the printer then on same problem reapear. so please help me solve the problem
shyam sunder kapurthala punjab

 

[PhilFrisbie]

Try unplugging the printer from power for 15 minutes and try again.