Pic or Crystal

Hello

If any one have expert opinion in how to now if the Crystal is bad or the pic chip is bad.

i made some board and no all work fine but i need to now what is the problems before change any parts..


thanks for the help .

- Try the Internal Oscillator. If the PIC has one.

- Use another PIC project that you know is working with a crystal, and try the suspect crystal.

- Use another PIC project that you know is working with a crystal, and connect the OSC2 pin to the OSC1 pin of the suspect PIC.

- Use a 555 type oscillator to create a frequency to apply to the OSC1 pin of the suspect PIC.

- Use a 74HC04 to create an oscillator that you can test the suspect crystal with.

- Oh, and check your config lines for the proper Oscillator Configuration.
Might want to try that one first.
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thanks for the help