But the 27-year-old former Nickelodeon star still refuses to accept their assistance, Radar has also learned.
"Amanda's parents and her brother and sister, Tommy and Jillian, are all convinced that Amanda's erratic behavior on social media websites is her way of crying out for help," a source close to the family said.
"Amanda's mom has tried to get her help in the past, but she absolutely refuses to accept it."
What's more, Bynes' parents Lynn and Rick are "powerless to do anything" because there are no legal options available to them to help rescue their daughter, the insider added. Bynes stated publicly that she does not speak to her parents after Radar exclusively reported that they were upset by her behavior. Sources confirmed to Radar that the actress has cut them off but her parents are desperate to help.
Here's a quick refresher as to why the isolated Bynes family could be concerned: The ex-What I Like About You star became fodder for entertainment media last year after a number of lapses including a DUI , a hit-and-run, as well as two separate incidents of driving with a suspended license.
Then came her crush on Drake, complete with the most bizarre tweet ever when she told him to "murder by (censored word for 'lady parts!'). She has continued her obsession with Drake by sending him numerous tweets but he has not responded.
"Her parents know the only reason she left Los Angeles to live in New York was because of them," the source added.
"At least when Amanda was in Los Angeles, they could keep tabs on her.
"If her parents were to move to New York City, even temporarily, they fear she would immediately move out of the area."