I'm using the sketch ArduinoISP to flash new bootloaders to 5No. Pro Mini's (ATmega328P U-PH) using an Uno. Four of the Pro Mini's flash OK but 1 gives the error:
"avrdude: Expected signature for ATmega328P is 1E 95 0F
Double check chip, or use -F to override this check."
How would I apply "use -F to override this check" to the ArduinoISP sketch? I can't see the code that checks for the ATmega328P signature