MacBook Pro 15", A1398 screen connector corroded

[Esmon]

Hello there,

I could use some advise / tips & tricks / do's & don'ts / confirmation with following:
I have an A1398 with no backlight, the LCD works properly. The motherboard is ok, a spare screen lights up as usual.

The probable cause is a short under the connector at the display side. I spotted corrosion on the connector. I assume the user spilled too much cleaner on the screen in the assumption she/he could wipe off the staingate issue...

There is quite some corrosion on pins 1-5 being PPVOUT LCDBKLT, I2C BKLT SCL and SDA, so it is logical this is the cause.

There is a cap underneath the LCD PCB - what should this measure?

How do I repair this in the most safe way? I thought of following:
-Put a heat buffer below LCD print (alu-foil or so)
-Pre-heat to max 60 degrees Celsius
-Remove connector with wide soldering pin
-Clean residue with alcohol
-Solder new connector
-How do you remove the flux (standard Amtech) that gets in the connector while soldering???
-Measure for shorts
-Give it a try

Any experiences with this kind of issue would be very welcome because it is either a fix of 10 or 300 € if I screw up...

Best regards,
Stijn

 

[Esmon]

Thank you so much, I didn't know the existence of ChipQuick.
Could have avoided a lot of misery with this...

To understand correctly: the 138 degrees solder paste and the ChipQuik are alternatives to get the job done right? It is or the one, or the other.

If soldering a new connector on and Flux like the Amtech 559 gets inside the connector, is treating it with alcohol removing it all in your opinion.
I realise this is a very basic question, but couldn't find a proper answer online, while I have some difficult experiences with it (and I do not have an ultrasonic cleaner).

 

[2informaticos]

Alcohol is good enough to clean the connector.
I recommend you the 58 degrees alloy version, instead of 138.
You don't even need to apply hot air in this case.

 

[Esmon]

Thanks for the good advice! I managed to replace the connector and fix it.