This one has an intermittant fault which points to a pcb issue so i fitted a new one but it refuses to program.
It took 2 attempts for the card reader to show the programming was actually downloading but finishes with a solid red light to say it didn’t work….the question is whether this problem is the card, the reader or the new pcb?
even using inde’s wash doctor you often got a fail if you have a spare blank eeprom try that. worst case unsolder the old eeprom from the duff board and solder it onto the new so your fitting a programmed eeprom done this many times with no probs