Service ManualModelModelModelModel No.:No.:No.:No.: 75UF555075UF555075UF555075UF55508-3.8-3.8-3.8-3. SoftwareSoftwareSoftwareSoftware UpdateUpdateUpdateUpdate8-3-1.8-3-1.8-3-1.8-3-1. MSD3393LUMSD3393LUMSD3393LUMSD3393LU softwaresoftwaresoftwaresoftware updateupdateupdateupdate1. Copy the software files to a USB disk on the root directory;2. Insert the USB disk when the AC power is off;3. Turn on the AC power in turn to begin;4. Turn off the AC power until the indicator light fast twinkling;5. Pull out the USB disk and power on the television.Note:Do not turn off the TV while it is updating.34343434