PITTSBURGH (CNN) — Comedian Bill Cosby arrived in a courtroom here Monday as jury selection began in his assault trial.

The actor, 79, is charged with three counts of felony aggravated indecent assault of a Temple University employee in 2004 in his home.

If convicted, he faces up to 30 years in prison.

Cosby has pleaded not guilty to all charges.

Opening statements are due to begin June 5 in Monroe County, near Philadelphia.

Cosby wanted trial moved

Cosby, once one of America’s most popular entertainers, has been accused of misconduct by more than 50 women. Many allege he drugged and sexually assaulted them.

This is the only criminal trial.

The judge in February granted a defense request that jurors come from another county. The judge denied a request to move the trial, which Cosby sought due to pre-trial publicity.

Jurors will be bussed and sequestered in a hotel. The trial is expected to last two to three weeks.

Cosby does not plan to testify in his own defense, he told CNN host Michael Smerconish last week.

Some laughter in the courtroom

Cosby did not speak as he entered court Monday. He wore sunglasses, carried a cane, and held a man by the arm.

When he sat down, he needed assistance finding his chair. Cosby is “legally unsighted” due to problems linked to glaucoma, he told Smerconish.

Potential jurors’ eyes locked on Cosby when he walked in. Some in the back sat up so they could look at him.

Members of Cosby’s legal team smiled, even laughed, at times.

For most of the morning session, the defendant sat back in his chair looking straight up.

By the numbers

Judge Steven O’Neill posed 48 questions to 100 potential jurors — including 53 women and 16 non-white people — drawn from a pool of 2,934 potential jurors.

They answered by raising juror cards. Among the jurors:

86 admitted to having previous knowledge of the case or having read about it. 34 said they’d formed an opinion of guilty or innocent in the case already. 14 said their preconceived notion would prevent them from being fair or impartial. 35 admitted they or someone close to them had been the victim of sexual assault. 67 said that the trial would create an extraordinary or undue hardship. 14 said the fact that the case involves charges of sex assault would affect their ability to make a fair and impartial decision on guilt or innocence.