Yg300 Projector Software Update 'link' -

If the update fails and the unit is dead, try a "hard reset" by unplugging it for 10 minutes. If it still won't boot, the firmware was likely incompatible with your specific hardware revision. Pro-Tip: The "Update" Alternative

and is not recognized by your computer, you may need to recover it using a service tool. This is the absolute last resort. yg300 projector software update

What (e.g., freezing, black screen) made you look for an update? If the update fails and the unit is

A progress bar will appear on the screen. yg300 projector software update

Here’s a general guide for updating the software/firmware on a (a popular low-cost LCD projector).