My charger blew up the magsafeport (short circuit).

I ordered a new one and installed it.

Everything works fine but the screen has problems. The backlight works ok but there is no image.

I am using an external monitor and i can see :

Color LCD:

Display Type: LCD

Resolution: 1680 x 1050

Pixel Depth: 32-Bit Color (ARGB8888)

Mirror: On

Mirror Status: Hardware Mirror

Online: Yes

Built-In: Yes

Maestro243DL:

Resolution: 1920 x 1080 @ 50 Hz

Pixel Depth: 32-Bit Color (ARGB8888)

Display Serial Number: D280C0064021

Main Display: Yes

Mirror: On

Mirror Status: Master Mirror

Online: Yes

Television: Yes

but the screens stays black.

I tried all possible resets ( Pram / Nvram , SMC )

I checked the cables inside and everything seems fine. Sleep mode activates and deactivates the lcd backlight normally.

I searched the net for every piece of info about this and the only conclusion is that something in the logic board was damaged along with the magsafe port.

Thanks!