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Internal display not detected after replacing logic board

After spilling coffee on a Macbook Pro A1398 (Mid 2015) the device wouldn't power on consistently. (Sometimes it did, and when it did the screen seemed to work)

I opened it up and found corrosion in a couple areas on the logic board. So I replaced the MLB with a replacement part from iFixit. Everything seems to run fine now, but the built in retina display doesn't turn on and is not detected from the system profile. An HDMI external monitor works fine, however.

What I've tried so far:

- SMC and PVRAM reset

- Wiped the SSD and reinstalled High Sierra from the recovery partition

- Tried re-seating the internal display connector

The display connector looks fine. I also opened up the display assembly to see if there was visible damage there, but everything looks ok (to my untrained eyes).

Images of display connectors:

https://imgur.com/a/VdQA2

Any clues?

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Rubber the lvds connector with office rubber ,a little bit, and clean it with alcohol , dry it out and test it again. It seems that is not make contact well. If it have pad that push it if it exist remove it otherwise try to insert it as it was before.

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Thanks! I ordered a new LVDS connector, so once that arrives I'll be able to test if this works.

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You can change angles to see if can work with existing cable.

You can change the lvds cable first and if not work you can check this :

macbook back light ic is working and check if your screen back light is working...

Backlight / screen problem

You can see this long video if you have time, it might helpful for you to make some checks ... https://www.youtube.com/watch?v=nH-mWAt0...

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When you insert the Lvds connectors, don't touch the LVDS contacts!

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Jonathan Brennecke will be eternally grateful.
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