'Power Rangers' Star Jason David Frank Struggled with Mental Health, Friend Says - TMZ

since they became friends in 2010, Jason was always open with him about bouts of depression and mental health struggles -- though he kept it private from most people.

Mike says Jason had multiple family members die from suicide, and his mother also died a few years ago after battling cancer.

Mike says he last spoke to Jason roughly a week before his death.

Mike didn't realize Jason left that voicemail until after he died.