The one thing that confused me most was at around 80 minutes some bloke walked round them all and took out the pin from the emergency exit ones which I assumed was something you pull out and they dropped down and he moved it from the left hand side to the right. Did every board with an emergency exit sign on it. No idea why
As for the scoreboard, paint a big, white zero on it. It'll at least display the home team's score correctly and not waste any electric.
Failing that get oulare and the other injured players holding the score up periodically, could be built into their rehab programs. Might aswel get some use out of them.