To tushki7, I have rechecked and its all working but still Iam not getting anything on screen except black boxes on first line. My +5v power supply was not working so I have to give +6v. But later I gave another +5v power supply from regulator 7805. Now also, its not showing anything except black boxs
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To firevsice55, I checked the hardware connections, there is no problem but still Iam not getting output
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To aameer, I was getting the output before desoldering. So it cant be any changes with program. Is it a necessary that i should change the crystal?