Wow, ouch, that's not what I was thinking... There are reports of people simply taping the ribbon cable in place in that situation although I personally would at least like to see a wedge (of paper or...) or some other method of ensuring the cable stay in place with good contact. Tape or hot glue have been used in the past successfully as options. I don't think I would recommend replacement (unless you're a soldering wiz) due to the proximity of other components there. Alternatively, you could simply purchase an identical motherboard (the more expensive yet easier way out).
Hope it helps