Hello. I wonder if anyone can help identify the missing component from this A1278 logic board? I have read other post's on this well informed website but was unable to see clearly in any of the photographs the number of this thing which I believe is a double diode or transistor. In one picture I think I can possibly see 'KHP....' or maybe the K is an 'X', I really can't be sure. This board was in a pretty bad way but I think I have recovered it enough to give this a shot if any of you kind folk can help? I enclose a picture to show the one I'm referring to. Many thanks in advance. Phill Thorne.