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Power light flashes till i smack the back of my monitor lightly then it will work for a while?

\015 My dell E151FPb monitors green power light blinks on and off and there is no picture untill i smack it lightly on the back of the monitor then it works for awhile?\015

Answers :

Looks like a loose connection in the monitor better take it to service personnel. and don't smack it cos if the loose cable hits any internal portions of the monitor a big showdown can happen.

take it to a service personnel asap
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