Optoma EX774 Serivce Manual page 41

Rev. 00
Caution:
DO NOT install any USB driver when erasing or upgrading process started.
Step 7: By the Flash technology, the old firmware needs to be erased first. Flash-Tool will automatically erase the
old firmware before upgrading.
Erasing status
Caution:
DO NOT install any USB driver when erasing or upgrading process started.
Step 8: After old firmware erased, the new firmware upgrading process will start.
Upgrading new firmware
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2008/07/02