Hello Sairam,

> both the boards were not functional. On replacement of the crystals
> and capacitors, one of the board has started functioning. The other
> board is not functional even after replacing three sets of capacitors
> and crystals of both XT and HS frequencies.

Have you checked if the 3 sets of crystals that you used were functioning?

Sometimes the 22 pF caps do have a short and this could be your problem.

Cheers

Ravi

e-CHIP, GOLD LEVEL Microchip Design Partner,
Bangalore, India. http://www.echip.co.in
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