Check all the solder joints and make sure none are cracked or broken. Looks like the adhesive on the display supports has given out (common problem.)
If the solder joints are good, for the top display, the segment out means the 7180 at U15 has gone bad. This is a PITA to change since it is behind the top display, never mind the fact that a replacement is $20:
Your bottom display looks like it's either a connector or glass issue. There's no pattern to the missing segments or digits that would be consistent with a component failure.