Boolean Circuit help

Do you notice anything connected wrong in this? We keep trying but the values are incorrect from the truth table . Thanks.

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It's probably far too hard for anyone to follow a circuit from fuzzy photos. I certainly can't work out which IC does what. You haven't labeled anything.

You need to test each gate in turn. For instance, check that your (A.B) bit is working first. Only if that is working do you move on to the following OR gate.

I think you have the wrong boolean equation.

Isn't D inverted right away?

You need to figure out what the little Flower Icon on your camera is for.