You haven't tore them slightly have you? Or crimped them
And are they seated correctly in place with adhesive.
These cables are easily damaged when removing the screen. I only ever move the screen out by about 30 degrees, then use a spudger to remove these keys from the glass.
Luckily if it is broken, they don't cost much to buy.
And to install just remove the screws (plus the hidden one behind the sticker on the right) to remove the plastic cover.