Microcontroller shutting down in etched circuit, but works as expected in breadboard circuit
Is your circuit diagram complete? If so I miss the mandatory decoupling capacitors!

You don't mention the type of microcontroller you use, from the diagram I assume an 28-pin PIC like a 16F876 or 18F242 or the like. Such chips have two ground pins, which MUST both be connected to ground. You seem to use the chip's ground pins as a wire to connect your two grounds, which is not a good idea.

Does the chip have an internal reset and did you configure it? And idem for the oscillator?