toshiba a135 notebook won't start: no display, lights for hard disk/dvd light up a couple of seconds. i opened, tried to reset cmos, but still no good, hard drive seems ok- works in external enclosure. i opened a panel lower right underside and the board there seems to be cracked! is that part of the motherboard or something else? is it worthwhile replacing?
thanks for any input.

barry, February 2011