oscillator problem

[languer]

A few pointers:

• Can you make a simple program to just blink an output - nothing more?
• Can you make this simple program run with; (1) internal 8MHz osc and x4 PLL [32MHz], (2) external 10MHz osc and x4 PLL [40MHz]?
• Your ground return lines on the PCB look questionable. Looks like you could've used a ground plane, but you chose to run lines back to the connectors. The crystal capacitors are expected to have good ground connections and the PCB does not appear to accomplish this.
• Simple code and possibly a schematic would go a long way to help troubleshoot this. Best guess at the moment is that the PCB is not close to ideal.

[malc-c]

To be honest I'm finding it hard to work that PCB out - I guess the copper is the top layer as it's surface mount ? - without the component overlay we could make assumptions that the two large components are capacitors and the component that sits over the top of what looks like capacitors could be a regulator..... just guessing

To the OP - you stated the circuit worked fine when breadboarded - try re-building it on vero strip board using descrete components (possibly the ones used on the breadboard) and see if that works. If it does then it would suggest that the problem is with either the PCB design or the SM components.