All large events and concerts at Fort Regent in Jersey are cancelled with immediate effect after the centre failed a series of fire and safety tests.
ITV News understands a complete electrical shutdown was carried out in the past three days, as a result of which managers now know the emergency lighting in the main Gloucester Hall doesn't work, and it caused lifts to break down.
Advice from fire safety inspectors means events with audiences of 1,170 or more are not allowed unless major infrastructure upgrades are made.
Among the events affected is a Human League concert on 24 May.
The promoters, RockIt Ltd said: "Rockit are absolutely gutted by the latest developments at Fort Regent."
They now hope to stage The Human League at The Royal Jersey Showground, Trinity.
This weekend's Rumble on the Rock event is being moved to a new site.
Plans for alternative arrangements, including possible venue changes, have yet to be announced.
A source close to government has revealed an internal report dating back months highlighted a string of issues needing fixing to keep Fort Regent safe.
Today a Higher Education Fayre is still taking place.
Assistant Infrastructure Minister, Deputy Hugh Raymond, said: "“It would not be right to allow events to be held knowing that safety was being compromised, and I hope alternative venues can be found for the events affected."
The Government says it is already working to improve safety and a ministerial steering group is being set up to look at ways that the Fort can survive in the future.