Keep holding the button for approximately until the standby LED begins flashing (usually alternating red/green), indicating the update has started.
While it supports Full HD, the AKTV32 models often use the 1366x768 resolution configuration. Firmware & Software Update Guide Download File P75-2841V6.0_1366x768_AKAI AKTV32...
If you install firmware from a similar model (e.g., AKTV3225), you may encounter an inverted or "mirror" image. Keep holding the button for approximately until the