Yes, any stress or pressure will probably make it worse over time.
You might find an identical unit on Ebay with a good screen and
bad motherboard.

wrote:
I have a Toshiba Satellite 1135 which recently sustained damage to the
LCD screen. The screen is not badly cracked; a hair-thin crack runs
diaganol across the screen, and there is a black circle about 3 inches
in diametre in the upper left-hand quadrant of the screen. It does
not greatly impair my ability to type or watch DVDs. However, I am
concerned that there is a possiblity of the crack widening or getting
worse--is this possible? I don't want to replace it if I don't have
to, because at $600US I can buy a whole new laptop these days. What's
the verdict?