It’s been a rough couple of years in the AC/DC camp. First Malcolm Young stepped aside from the band after it was revealed that he was suffering from dementia. Then they lost their singer, after Brian Johnson had to step down or risk losing his hearing forever. And while the band, of which Angus Young is the only original member left standing, hasn’t said anything about their future since Axl Rose finished touring with them, Angus and Malcolm’s older brother George, who mentored the band and produced a handful of their albums, has died at 70.

Young first came to fame as a member of the 60’s pop group The Easybeats, who had a hit with “Friday on my Mind.” Young, who played rhythm guitar in the band, went on to write and produce music with the band’s lead guitarist, Harry Vanda. The two went on to produce many of AC/DC’s early albums, icnluding Let There Be Rock, Dirty Deeds Done Dirt Cheap, TNT, Powerage and High Voltage. The band paid tribute to Young earlier today.