Optoma EP739 Service Manual page 42

5-3.2 USB Driver Upgrade Procedure
1. After linking the PC and EP739/EP738 series projector with a USB cable,
press and hold the menu button, then push the power button to turn on the
projector.
Note : The "Temp" LED and "Lamp" LED should be full on.
2. Execute the C:\Program files\DLP Composer\usbupdata.cmd.
Note : The "DLP Composer" program must be closed first.
3. Type any key to continue. Then wait about a minute.
5-5
EP739/EP739H/EP738
Series