Actually, depending on age, it may be better to replace the unit with a new one. t_b noted above the costs of screen replacement. i.e., and from my view, the repair price today almost makes for instant obsolescence!
Then again, you may be able to find a junked Sony laptop with a good screen? Below link gives a current cost idea, unfortunately an expensive one.
http://www.screentekinc.com/Sony_Vaio_BX-S...cd-screen.shtml