Strange problem in the pcb

[eehadi]

Hi. I have a Spartan 3 50AN FPGA on my board. Sometimes when I turn on power supply, FPGA doesn't start untill digital input would change or I hit a conductor e.g GND on board by oscope or multimeter probe. I have no idea why this happens.

 

[shaiko]

Make sure all the configuration resistors are mounted and that their value is correct.