No idea, how to restore Model Info?

I tried all buttons, combinations, no any reaction,onlyl No Model Info
Power button pressing reset the unit and Internal Error message

Thanks, i tried it before, not working bcoz no model info
First need repair model info

Hi
I have yamaha rx-a1040 with internal error message, when i plug ac cord.
In the service menu show No Model Info! The service manual say, if the ic78 eeprom changed or corrupt, need rewrite model name
Eeprom is renesas R1EX25512ATA00A 512kbit spi eeprom
I readed eeprom maybe possible to repair....
I need good dump, or procedure for program model name (i did it with htr2071 by shorting testpoint and set model name), but i can not find info for this avr

thx
Tom...