It might look okay at first glance, but if you're okay with it, carefully remove the cable from the screen (emphasis on "carefully") and then push it back into place. If there is some tape that secures it, be sure to reapply that tape too.
And if this continues happening, you can try the same thing where the cable runs to the motherboard.
Should all else fail, that cable might need replaced. Worst case scenario is its that the screen or the motherboard is the source of the problem, but that's less common.