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tomic19
20th January, 2022, 09:06 AM
Hello, I have radio from pictures. Backup battery was dead and I need working dump for eeprom.

I replaced battery and radio starts working but, when I turn it on I have just 3 ---, and buttons dont work.

Regards
MrRepair
20th January, 2022, 10:56 AM
Leave radio on for 1 hr. Then --- will change to CODE. Enter code 204.
tomic19
20th January, 2022, 12:42 PM
I did that first... 8 hours is stay on and nothing happens
MrRepair
21st January, 2022, 07:42 AM
Radio model no ? BE****
tomic19
21st January, 2022, 08:04 AM
You have on radio label....

Grand prix electronic 754....
MrRepair
21st January, 2022, 09:16 AM
Must be a BE0754. It uses PCF8571P ROM. Memory data is lost when battery fails.

I used this solution long time ago: https://www.youtube.com/watch?v=J0fxASPGSw8