If the update appears frozen, do not turn off the projector. First, check the progress bar for any movement. If it is completely stuck, you may have to risk a restart. Unplug the projector, wait a minute, plug it back in, and hope it recovers. If it doesn't, contact technical support for further instructions.
Before attempting any software update, it is crucial to understand that the "YG300" is a generic model name manufactured and rebranded by dozens of different factories (such as AAXA, Salange, Meer, and generic OEM brands). yg300 projector software update upd
Turn on the projector and let it boot to the main home screen. If the update appears frozen, do not turn off the projector