I just checked the Ariane site. They have a countdown clock showing the broadcast will begin around 20 minutes before launch, or in less than 40 minutes.
Google automatic translation from french:Thirty minutes before departure of the fourth missionRussian launcher in French Guiana, a red "launch complex" camebar table operations.Arianespace has decidedto postpone the launch of 24 hours. According to Jean-Yves Le Gall,chief executive of Arianespace, "switching equipment thatregulates electric waves coming from launcher "sending" ofsignals not normal. "Despite two-way operationalthis equipment, Arianespace was willing to take risks. immediatelydecision, technicians began dismantling andchange the offending equipment. A new chronology isscheduled for this Saturday night, always with a H0, that is to say, without windowfiring.
QuoteGoogle automatic translation from french:Thirty minutes before departure of the fourth missionRussian launcher in French Guiana, a red "launch complex" camebar table operations.Arianespace has decidedto postpone the launch of 24 hours. According to Jean-Yves Le Gall,chief executive of Arianespace, "switching equipment thatregulates electric waves coming from launcher "sending" ofsignals not normal. "Despite two-way operationalthis equipment, Arianespace was willing to take risks. immediatelydecision, technicians began dismantling andchange the offending equipment. A new chronology isscheduled for this Saturday night, always with a H0, that is to say, without windowfiring.http://www.franceguyane.fr/actualite/economie-consommation/soyouz-reporte-de-24-heures-145707.php