I'm with Danno, get the stethscope, see if there are any bees in the possibly dead hive. If they are dead then put the honey on the other hive under the sugar. Good luck to you and your bees.
Down here we get 2 extractions a year, this year when it was time for the first my bees had very little honey, so I left it. When it got close to the latter extraction time, the supers had honey but the brood chambers had very little, so I left it. Was going the check again during or after golden rod flow, weather changed and I haven't got to check it so they have all that they have made this year. Some had two medium ten frame supers on.