Acer P5271 Acer P5271, P5271i, P5290 and P5390W Projector Series Service Guide - Page 88

7. If the FW is ready, click "Start Download" to execute the firmware upgrade. - Click "Yes". 8. Proceeding Picture. 9. It takes about several minutes, the firmware upgrade process is finished, "Download completed" will appear on the screen. - The projector will automatically turn on. - U nplug USB cable. 10. Check FW version.  - Get into the service mode to check the firmware version. (To get into service mode, please press "Power", "Left", "Left" and "Menu" buttons sequentially.) P5271/P5290/P5390W/P5271i Confidential 5-