Optoma EP774 Service Manual page 47

Caution:
DO NOT install any USB driver when erasing or upgrading process started
Step 8: After old logo erased, the new logo upgrading process will start.
Step 9: After the new logo changed, the Flash-Tool will perform the final validation. The dialog showed checksum
with verification message!
Done! Power off the projector.
Step 10:
Company Confidential
Erasing old logo
Changing new logo
Checksum verified
Optoma_______________________
47
Rev. 01
Delta____________
2007/06/13