I think I fried it!!! I got an uno worked fine ordered a cnc shield put grbl firmware on my uno everything seemed to go fine stepper motors didn't move then I realized I had not hooked power to the cnc shield so I hooked 12 volts to the shield and tried it again now nothing grbl controller program says no data from com port after connect so I restarted my computer tried to reupload grbl onto my uno and I get no upload and an error so I tried to upload a simple fade code and I get this below its not uploading but it does see the uno is connected
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x22
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x22
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x22
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x22
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x22
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x22
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x22
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x22
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x22
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x22
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
looked on the web site cant find anything tried reinstalling Arduino software it didn't help power led is on and so is the pin 13 led its not blinking its on steady hit the reset nothing happens my mega still works fine so i'm sking here did I fry the uno , did I fry the chip, and can I load the uno bootloader to the uno chip with a mega if I fried my chip
ok so no one is going to tell me if I fried it or just the chip or have any idea at all whats going on ?
Depending on where you connected 12V on the Arduino board, you may have fried the chip, or the board.
Try the Loopback Test, see if the USB/Serial interface is working.