Thousands of music fans descended on Swansea as rock band The Who played the first major gig at the Liberty Stadium since it opened in 2005.
Power was lost three times in the first 30 minutes, twice during one song.
Singer Roger Daltrey threw his microphone in the air in frustration but the show carried on without any further hitches for another two hours.
A huge crowd was at the first stadium gig in Swansea since the Stereophonics played the old Morfa Stadium in 1999.
The gig also featured a set by indie rockers The Charlatans.
Parking capacity near the stadium was doubled as organisers tried to cater for the extra demand put on the city.
Many of the car parks earmarked for The Who fans are situated within walking distance of the stadium and were signposted.
Organisers had urged fans to arrive early for the concert, which started at 1815 BST with a 30-minute set by Killing For Company, the new band recently formed by ex-Stereophonics drummer Stuart Cable.
After the concert, the A4067 dual carriageway adjacent to the stadium was being closed for up to 30 minutes to allow fans to leave safely.
A spokesperson for Swansea Stadium Management Company said that Friday was a "huge date" for the £27m venue and Swansea in general, and that they had worked on transport plans with South Wales Police and Swansea council.
The Who concert in 1976 in Swansea was one of drummer Keith Moon's last before he died
Stadium general manager Andrew Davies said: "It was an absolutely fantastic night and everyone was blown away by all three acts who certainly made it a memorable occasion."
He said organisation had gone "smoothly" and everyone involved was "looking forward to building on this success in future years and firmly establishing Liberty Stadium as a first class live music venue."
In 1976, The Who played the Vetch on their acclaimed "Who Put The Boot In Tour" and it became the last UK paid for concert before drummer Keith Moon died.
Frontman Roger Daltrey and guitarist Pete Townsend are the only original members of The Who left, although they were joined on the Liberty Stadium stage by Cardiff-born bass player Pino Palladino, who has toured with the group for many years.
In May, tickets for the gig were being advertised on internet sites at more than twice their face value - even though the gig was not sold out.
Stadium managers said tickets priced at £40 to £55 were being offered for sale at close to £120 on some auction web sites.