Sony’s transition to Google’s Android TV OS (2015–present) and later Google TV (2021–present) introduced a unified update architecture. However, unlike mobile Android devices, Sony TVs lack a recovery mode button combination visible to consumers; instead, they rely on a USB-driven bootloader routine.
Some Sony TVs (e.g., X800H series) have a hidden hardware limitation: USB ports with insufficient current (500 mA) cannot sustain the write cycle during update. Use a Y-cable power injector or a self-powered USB hub. sony tv software update usb