Here is the information regarding the firmware update process for the . 1. Critical First Step: Check Your Version Before attempting an update, you must check if one is actually available. The AVR-X520BT is a budget-friendly model from roughly 2015/2016, and firmware updates for this unit are rare. Denon typically only releases updates to fix critical bugs or compatibility issues (such as HDMI handshake problems). Tamanna Bathing Without Dress Video Direct