Replaced MagSafe 2 DC-in board, laptop still not charging. What now?

My charger was frayed and it would get warm. Sometimes I would have to play with the cord to get it to charge. One day I was playing with the court when I heard a popping sound near the MagSafe 2 DC-in Board and I smelled the burnt electronics oder as well. The light on the MagSafe 2 charger went out as well.

I thought I may have fried my charger so I purchased a brand-new $80 charger from the Apple Store but my laptop would not charge. So I went through the common troubleshooting procedures and finally decided to change my DC–in board. When I opened up the MacBook I discovered that the P7 transistor on the old DC-in bold board was burnt out, as indicated by the black soot around it.

I purchased a brand-new board from iFixit but I noticed that the wire colors were different than the wires on my original board. My original board had all-black wires while the board from iFixit has three black wires and two gray.

What I've decided to is was downgrade my laptop to the original OS which was OS X 10.8 mountain lion and see if the reason why the iFixIt DC-in board doesn't work is related to firmware or the OS X operating.

I'm thinking that when I upgraded to Mavericks my firmware may have upgraded the original DC-in board, but most likely not, I'm just desperate just trying everything, this is a shot in the dark.

I took it Apple, they couldn't do the repair at the store do they sent it to their repair depot for repair at a flat rate. Turns out it was the DC in board and the Logic board.

The cost was very very reasonable for what they had to repair/replace.

Thanks for taking the time to return and let us all know the true problem and it's solution