W520 board do not power ON

[jdwis]

Hi

My W520 wont start at all

The story -
Original DC power socket was quite loose and cable would come off every now and then, so thought to change that "yellow" socket
Exactly similar socket with "some notch and groove" inside ones was little costly so bought the one, similar model which was just round and no "notch" etc in that yellow socket.
All pin configurations are same from the back, the only thing was it came with diff cable connector so I moved the cable + connector from old one to new one
W520 power connector has 7 pins - 3 black (-ve), 3 red (+ve) and 1 blue (not sure what that was), but at the end of connector negative and blue were shorted - all in original connector - and that wasy it was all working fine.

So moved that power connector with its cable to new socket.
Now, to get to that yellow socket, I had to pull out the whole board, somehow it was so so difficult as I overlooked one of the screw near that socket and I kept applying some pressure to pull it out (away from the bottom plastic case).

After all this changing, and when put things back, the board wont turn ON, no pwer light anywhere when power cable is connected to the socket.
I know that when you connect the power cable. immediately the green power LED on screen panel lights up, but now that doesnt happen either

I checked the voltage on power connector after connecting to the board and voltages are fine 20V

I dont know what else to check on the board