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How to fix "wavy" lcd surface? (and it has rainbow-ish effect)

i bought a *very* cheap camera (Camedia C-2 zoom (D-520/C-220), comes with smartmedia card which is expensive by its own, exceeding the camera's own worth, however the camera itself has a weird lcd issue, the seller said that it happened because of "eucalyptus oil", i know that this would trigger some people and said "its irreversible,change the lcd" i would do that if the parts are still available which isnt

now i have done some basic tricks like using toothpaste, rubbing alcohol etc

however i'm wondering if any of those scratch removing pen works

or maybe giving an almost impossible task of evening the top layer using nail polish to lower the effect

or another almost impossible task of "removing" the lcd top layer using heat gun or hairdryer and just cover it up with a standard screen protector

i havent tried it and im afraid of the "if i mess up i cant undo what i just did" scenario, has anyone have past experience with this and managed to deal with it without changing parts ?

image/album for references:

http://imgur.com/a/wTpVI

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no-one seems to help, but i've managed mend mine so 'ill share my method

  • open the camera
  • open the tft-lcd enclosure
  • separate the lcd from the backlight
  • gently open the lcd
  • take the old polarizer sheet slowly (its glued like labels on plastic foodwares)
  • clean the remaining glue
  • grab some old devices with tft lcd's and take the top layer (polarizer)
  • put it on the old lcd (while powered on) to check if it works, if it does next step, if not try rotating it or find another one
  • re-close the lcd (re-glueing is optional, i prefer to jam it to the sides for simplicity)
  • re-assemble the camera and try not to break it the next time

i believe on most nikon cameras this isnt a problem as its protected using a glass layer on the body, but on other camera (of the time this was released) of the same class they directly put the screen to the outside world without any layers of protection, for example this camera

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