Scorer Gives Wrong Server Information

[bob jenkins]

Team A asks for a line-up check. Scorer says next server is the libero. Libero serves and Team A wins the point. Now we find out the scorer was incorrect.

I'm "certain" the ruling is that we don't penalize the team for the wrong server, but we also don't let them benefit from it. Wipe out the point scored when the libero served, put team A in the proper position and let the proper server serve.

There used to be a case play similar to this play with this ruling -- but I couldn't find it last night in a quick search. Any help?