I have programmed 5 new EProms with 1.03 Firmware. Then, I changed the EProms on YA and YB-Board. I switched S400 to "Table".
Normally, if you power the Projector up, you see the following Codes in the Display: 68 ---> 7 ---> 12 ---> 14 ---> 16 ---> 60. Then, you power up, and its ok.
I see only this in my Display: 68 ---> 7 ---> 60, powercyle, and nothing goes.
I think that you can only upgrade, but not downgrade.
Regards,
Joerg