Dvd Player with ''no disc'' error message repaired

This LG dvd(china made) fail to play when you load disc in it and instead gives out the "no disc" error message.Some of the causes of
this fault includes :
  1.bad optical lens
  2.spinning motor 
  3.bad dvd flex
  4.faulty video board
But in this dvd the major suspect is the optical lens.Looking closely at the lens I find it dificult to believe that it is bad so i decide to check probably i can find something to do to it to make it work again.Checking through the Iens I saw a tiny foamlike particle in between the lens and blew it off and just test to see maybe it will work and believe me it works perfectly.Its my first time of encountering this type of fault and any other time i will be checking for this dirts.


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