My PB/667 took a fall about 18 mos ago. It's been fine ever since, except there is a single vertical line RIGHT DOWN THE CENTER - top to bottom. It's about two pixels wide and appears to be a bright green/near white color. Any display pixes that fall on this line are not visible. A coworker suggested that this could be fixed but didn't offer how. Have any of you heard of this sort of issue? Is it fixible? This PB is still a good machine so any help to keep it going would be welcomed!