You need to upgrade firmware to 20180403 or later version, you can download firmware from ViewSonic website. After done the firmware upgrade, you need to press remote control INPUT991 to entry DEBUG MENU, then select Other Setting and set USB Disk Enable to OFF.
How to disable IFP7550 USB port Print
Created by: Andy Chu
Modified on: Fri, 4 May, 2018 at 10:10 AM
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