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Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

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No Display and no backlight but external display works

i have a macbook pro 2012 that is showing no image on the screen with no backilight and if an external monitor is connected and i go to about this mac > Display it doesnt show up to the system

Please help i need to fix it asap

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Sounds like you have some liquid damage to the logic board at the location where the internal display is connected. You’ll need to open the system up to inspect the connections for damage. Follow this IFIXIT guide to Step 4 MacBook Pro 13" Unibody Mid 2012 Logic Board Replacement. Then jump down to Step 15. Does your connector and the solder joints look like this:

Block Image

If not you’ll need to do some cleaning and you still may need the logic board repaired or replaced (as well as the LVDS cable to the display).

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4 Comments:

to my knolege the device has never been in contact with liquid

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You'll still need to open the system to check things out. Take a few pictures and post them here for us to see Adding images to an existing question

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Agreed possible liquid damage to the connector.

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i will attempt to take pictures tomorow, had the mac appart and completly removed the display assembily to tighten hinges but theres still no life after putting everything back

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