Originally Posted by Livid
I got the same "Error!! 5-64" on my Fry's special HT-RC360. The error was displayed almost the instant I started downloading the update. The previous firmware update worked fine a week or two ago. Pulling the power cord and plugging it back in at least got the receiver working again.
I tried again and the firmware update worked! Maybe error 5-64 means "server busy". :P The only thing I did differently was switch to an unused input (blu-ray) before doing the update.
Sony XBR-75Z9D, Denon AVR-X6200W, Polk LSiM 703 x 2, LSiM 704c, OWM3 x 6, Velodyne Optimum 10, Apple TV 4K, TiVo Roamio Pro, Sony UBP-X800, Nintendo Switch, Panamax MR4000, Harmony Elite.