my UNO is not working. I hooked up at oscilloscope to start debugging it. the crystal for the ATmega8u2 is working. so i checked the crystal feeding into the ATmega328p-mu and there is no signal.
the only LED that blinks when trying to program (fails programming) it “RX”
when I plug in the USB cable non of the LED “RX” “TX” & “L” blink, only the “ON” LED is on
both the ATmega8u2 & the ATmega328p-mu have been replaced and flashed ( or so i think)
the ATmega8u2 now shows up as an “Arduino UNO” and not a ATmega8-DFU"…
Device Instance Id
opti code flashed with another arduino using this method
here is a scope shot during programming