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Model A2159, EMC 3301. A refresh of the entry-level 13" MacBook Pro. Available in Silver and Space Gray. Released July 2019.

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MacBook A2159 TCON Board

Hey, so i have a question about the tcon board. it suffered a liquid damage where a connector has melted and two solder pads with it. i want to replace the pads but couldn't find any info on the purpose of the pads. maybe someone could help me out here. i don't know if there is a connection underneath.

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Okay, so i measured the pins and decided to recreate the pads (for stability) even if they aren't needed because there is nothing on them (might be the reason why they came off so easily).

Thanks for the picture @oldturkey03, helped very much.

In my case the picture should be upside down like the picture i'm showing below.

I measured the upper pins and the 6 pins in the middle are the LED_RETURN.

Now i'm waiting on the the connectors to solder onto the tcon board and the cable and it should be working.

Thanks everyone for help.

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and for the record.. this is how it looked like before i removed it.

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@abrahamobama looking at your images as well as the connector, you are right that is ground only. Your T- Con board connector is identical to the one used for the A1708. Here is the pinout for that connector. BTW that connector is your backlight connector :-)

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thanks for your answer. my question is are the pads pin 19 and 18 or 8 and 9. because the outside ground is obviously the minus pads in my picture. 8 and 9 should be nothing?

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my thought is that where the arrow points is pin 1 (pin 2 because pin 1 of the connector should be right next to it), so the pads are irrelevant, which would explain why there is no connection to anywhere. i measured the 6 pins on top where J0803 is in diode mode and measured with ~.6 voltage drop so it should be the LED_RETURN pins.

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@abrahamobama yes, that is the way it appears. If in doubt you can always measure the actual cable connector and the corresponding lines i.e. LED_Return_1, 2 and so on, on your logic board. That way you can determine which pad corresponds to what line. For now, I would proceed just the way you are doing it.

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Sadly, the display unit is not documented within the schematics & board view drawings that I have. Maybe someone else has deeper knowledge on this connector pinouts.

Is there any visible copper along the pad edges? You may need to scrape off the over printed covering a bit so you can bond a piece of board trace repair which is nothing than a thin roll of copper foil with an adhesive backing to then connect via soldering across and then placing the replacement connector on top. I use a razor knife to cut the foil into the correct width or shape.

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SUMAJU 4 Pack Copper Foil Tape with Double-Sided Conductive Copper Tape Conductive Adhesive for EMI Shielding, Stained Glass, Soldering, Electrical Repairs, Grounding(1/4inch)

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i will check it later. i didn't want to scrape everything off before maybe someone knows where its connected to, so i can solder jumper wires to it. but maybe its the best option to just check it myself and recreate the pads.

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@abrahamobama - As the pad is damaged where this connector sits you will have a hard time patching with a wire and the plastic of the connect tens to melt which you don’t want either. Which is why I recommend repairing the board then soldering the connector on top of the patch in this case.

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yes, thats exactly what i would do with a wire. did it many times before, connecting the wire to the right spot and then glue it in place where the missing pad are and put the connector on top of it. but if theres a connection next to the missing pads then i just use my pre-cutted solder pads to rebuild them. i will check on it later, thank you

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so i scratched a little bit away above and underneath it but theres just ground. maybe the pads are ground but i'm not sure, so maybe someone knows the answer

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@abrahamobama - The outer edge ones are likely ground as OldTurkey found a diagram that supports that the inner pin (19) maybe not used.


I would still patch the ground line as that is also used for EMI protection.

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