Cost to service a 5D
service centers drive in and ask.
I have a T2i converted to infrared that the display has some "lasering" marks on it (pixels that are all one color). It doesn't make the LCD unusable but is annoying.
I took it to the repair center which is about 4 miles from where I work and they said it would be $190 to fix with no warranty on the repair.
They were very nice about it and gave me an estimate on the spot.