If you want to give my eeprom a try, let me know.
I got it back in the early 2000's for a set that was dead, I couldn't order just one, that's why I have a couple extras. IIRC, the new eeprom was close enough to get the set working, but to get it back to the exact settings of the original, the set needed to be powered up with the new chip, turn power off but leave set plugged in, then put the corrupt chip back in. The set would still power up with the bad chip, but the service menu options would now display the original values. Make a note of the values, reinstall the new chip and adjust them to the values that you recorded off the old chip.
It's been a long time, but that's how I remember it and the set came out fine. In your case, I wouldn't use any of the settings of the corrupt chip that you had messed with. John, does that sound right?
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