rainbow effect at edges

[jaosobne]

hi all,

I've finished my PJ this week ,but i've got a little problem with rainbow effect at edges .Not at all but only in those 2 which are near to lamp.I have vertical design with 3pc 80mm fans with 30 cfm mounted at the bottom .Is this problem of cooling ,fresnel position or i damaged my lcd ?

thanks

 

[jaosobne]

rainbow attachment

here is foto

 

[jaosobne]

without rainbow

i try everything ,but without succes .....
and when touched my UV-filter ,rainbow disappears

than i checked it and remember that i taped filter to glass .

that was problem .