I am having two custom made PCB using ATmega328P. Both boards were working fine. One day one board stopped working. During fault finding I found that the controller on the non working board doesn't start, reset. I have replaced the 328P on faulty board from working board still it doesn't work.
I have checked following things on faulty board, though the faulty board was working earlier so I am not doubtful about the connections of the components.:
- Supply of 5V & GND is OK on the pins of 328P.
- RESET pin is pulled up with 10K. It is getting HIGH after power on.
- 16MHz & capacitors are connected properly.
The LED's connected to ports doesn't blink at all on power up as they do on another working board. No idea why it stopped working on faulty board.
If anyone has clue/suggestions to further check please guide me.