Published Friday, 10 July 2009
The sound cut out during Wonderwall, one of their biggest hits, half-way through Thursday's concert at Wembley Stadium.
Gallagher shook his head as the crowd finished the song for them.
The problems came after thousands of fans asked for their money back following a technical glitch at the band's homecoming gig last month in Heaton Park, Manchester, due to a power fault.
Gallagher told Thursday's audience: "Can I just categorically say ..... no-one is getting their money back.
"Not you, not you.... not you with the glasses."
He also quipped: "Does anybody know any good jokes?"
Mentioning jokes about the late Michael Jackson Gallagher said: "That's getting boring although there are some belters.
"Last time this happened it cost us about half a million quid."
The band then broke into Supersonic with full sound and the crowd cheered.
Gallagher later joked: "I've just seen a generator round the back with a Trotters' Independent Traders on it.... I've got 50 quid, you can split it between you."
The gig saw the band come full circle.
Oasis were the last British band to play the London venue before its revamp and Thursday's gig was the first time they had returned.
Earlier Gallagher had joked about bandmate Andy Bell who was wearing sunglasses, saying he "looks like he's just come from the Jackson memorial".
The band played crowd-pleasing classics throughout the night, kicking off with Rock-n-Roll Star.