Little more than an hour into the day the jurors sent word to the judge that they had a question, but the query and its resolution were not publicly disclosed, drawing a protest from news media.
Jackson, 46, is accused of molesting a 13-year-old cancer survivor in 2003, plying him with wine and conspiring to hold his family captive to get them to rebut a damaging TV documentary about the singer. He could get several years in prison if convicted on the molestation counts.
The jury got the case Friday afternoon and deliberated for about two hours.
Jackson fans waited outside the courthouse Monday holding signs saying such things as "Only love. No crime. He's innocent. Leave him alone," "We shall overcome" and "Peter Pan rules." A woman held a sign showing Mahatma Gandhi, Nelson Mandela, Martin Luther King Jr., and Jackson.
But the fans were outnumbered by an international throng of reporters, photographers and TV crews. At one point, Jackson's father, Joe Jackson, arrived and was mobbed by cameras.
On the issue of the jury question, media pool coordinator Peter Shaplen said Judge Rodney S. Melville held a private meeting with lawyers in chambers to discuss the question and how it would be answered. Shaplen said the judge did not plan to reveal to the public what the jurors asked about.
The procedure is unusual. Normally, questions from the jury are a public record since they are submitted in writing by the jury foreperson.
An attorney for news organizations including The Associated Press filed motions seeking a transcript of Monday's closed proceedings, immediate access to any questions from the jury, and to any proceedings concerning those questions.
Jackson was treated at hospital emergency room in the town of Solvang on Sunday and rumors repeatedly swirled through the press corps that he was returning there Monday. Jackson spokeswoman Raymone K. Bain said he did not and was feeling fine.
The singer, who has complained of back trouble throughout his trial, left the Santa Ynez Valley Cottage Hospital late Sunday to the screams of fans. He had arrived nearly six hours earlier.
"He told me that it had been bothering him all week, but based on all of the media frenzy that ensued before, he decided not to deal with it," spokeswoman Bain, said Monday on.
"I don't think this hospitalization will affect jurors," says CBSNews.com Legal Analyst Andrew Cohen. "Even if they find out about it — which they shouldn't because they've been ordered to avoid all coverage of this trial — it doesn't have any relation to the charges. And I don't think it is going to generate any sympathy, either, if that's what Jackson intended."
"If it's a strategy, it is lousy. It doesn't score points with the jurors," said defense attorney Mickey Sherman on The Early Show.