Arduino uno R3 from eagle : avrdude: stk500_recv(): programmer is not responding

[shiohigari]

Hi all,

I loaded up the open source R3 schematics in eagle and had some boards made and have finally finished populating them. Unfortunately I am having trouble uploading any kind of sketch to the 328P-PU.

The bootloader was successfully installed on both 328P-PU chips. I have tried both the

Arduino-COMBINED-dfu-usbserial-atmega16u2-Uno-Rev3.hex and,
Arduino-usbserial-atmega16u2-Uno-Rev3.hex

firmwares for the MEGA16U2.

At this point i am unable to identify why neither board will receive a sketch.
Arduino IDE returns,

Binary sketch size: 1,082 bytes (of a 30,720 byte maximum)
avrdude: stk500_recv(): programmer is not responding

A loop-back test was conducted and the board successfully received the echoes.

Any help or insight would be appreciated.

[ripnet]

Do they have a bootloader?

[shiohigari]

The bootloader was successfully installed on both 328P-PU chips. I have tried both the

Yes they do.

[ralphd]

I don't see caps for the 328p's resonator.  Without them the timing of the UART could be off.  Try connecting directly to the tx/rx pins of the 328p with a USB-TTL module and see if you can flash anything to it.