I'm trying to overwrite the bootloader on a Micro with a sketch using another Micro as an ICSP. I've got the programmer Micro and the target Micro's MISO, MOSI & SCK wired 1-1, the programmer Micro's SS to the target's RESET, plus power and ground. I've got the 3 indicator LEDs wired to the appropriate pins on the programmer Micro. I downloaded the ISP sketch to the programmer Micro, and when it starts I see the 3indicator LEDs each flash twice, then the HB LED does the heartbeat thing. When I then try to load the Blink sketch onto the target Micro via the IDE (Upload using programmer, programmer is Arduino as ISP) I see some flashing of the on board LED on the target, some Rx/Tx activity on the programmer, but no activity on the P_MODE or ERR LEDs. I get the following from the IDE:
Binary sketch size: 4,830 bytes (of a 28,672 byte maximum)
avrdude: stk500_getsync(): not in sync: resp=0x00
I've posted this on the Adafruit forum, couldn't get much help. I'm kind of stuck and looking for suggestions.