Boulder County Police / . 1 / 2
Boulder County Police / . 1 / 2

BOULDER, Colo. (AP) -- A former cast member of the 1980s television show "Family Ties" faces a new assault charge after police in Colorado say he repeatedly hit a friend with a broken wooden stool.

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Twenty-eight-year -old Brian Bonsall was arrested Saturday and appeared briefly in a Boulder courtroom Wednesday morning.

The hearing was originally scheduled for another case, an alleged probation violation from a 2007 assault on Bonsall's girlfriend. A judge postponed the hearing to be able to consider both cases at the same time.

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Bonsall played the role of the youngest Keaton sibling, Andy, on the NBC sitcom starring Michael J. Fox. He lives in Westminster, about 20 miles south of Boulder.

Bonsall is being held in lieu of $7,500 bail. He appeared in court wearing a red jumpsuit.