The power went out in my parents house the other day.?

The power came back on. But when the power went out the manual converge on one of the tvs got knocked out of sync I guess. This feature has something to do with the picture you see on the tv. I think it focuses the tv. I cant align the manual converge red. The green and read lines go back to a certain point. But they won't align like they used to, before the the power went out. Any help is appreciated. But I would prefer answers from people who work on tvs.