Quoting sources connected with both men, "CJ" said Jones tried to warn Jackson "disaster looms" over the sleepover practice two years before the scandal broke.
"We are told Quincy Jones actually did an intervention on several occasions," Harvey Levin, executive producer of the TV tabloid news show, said. "Going to Michael Jackson and saying, 'Look, this is inappropriate, it's wrong and it could bring you down if you don't stop.' It was that serious."
But, sources said Jackson "didn't take it seriously."
Jones is on the defense witness list for Jackson's California criminal trial for the alleged sexual abuse of a youth.