MacBook Pro A2159 2019 820-01598 No Backlight Repair. Tricky hidden issue of missing i2c data line.

In this video I am going over no backlight on 2019 MacBook Pro A2159 that got me scratching my head a little. Figured it out so I am sharing it.
Parts and equipment I use:
Arctic MX-4 Thermal Paste: amzn.to/3WeclBF
Dumont Tweezers #5: amzn.to/3GajzRJ
X-Acto Z series #11 blades: amzn.to/3v7Bsdt
MG Chemicals Overcoat Pen amzn.to/34T7jow
Hakko FR810B-05 SMD Hot Air Rework Station: amzn.to/33Y4FNK
Hakko Air Rework Station Bent Nozzle Kit: amzn.to/3FOdPtl
JBC NASE-1C Nano Rework Station: amzn.to/3eKTKsB
Hakko FX951 Soldering Station: amzn.to/3JPVNdj
Hakko T15-BCM2 Concave Bevel Tip: amzn.to/3JSwLu1
Amtech NC-559-V2-TF Flux : amzn.to/3eGt9Nm
Low Melt Solder: s.click.aliexpress.com/e/_ACum5W
Mechanic Leaded Solder 63/37: s.click.aliexpress.com/e/_AeKk9i
Mechanic OK7 Glue: s.click.aliexpress.com/e/_A9Ujxr
Qianli Macaron Spot Welder on Amazon: amzn.to/3ScVMDx
Qianli Macaron on MobileSentrix: bit.ly/3QOySS3
Kingbo Soldering Flux on MobileSentrix: bit.ly/3G1JN8P

[@jahknowstar4714]

No one has done this before u are the best my brother

[@titotinton]

Thanks

[@MinhHa-dv4it]

Thanks for your video.
So, does it mean that if the mainboard is replaced, will this issue be fixed?

[@applepietech]

If your screen is fine - yes. In this video I was fixing the board though, not replacing it.

[@harrylee4448]

Do you repair backlight of A2159 model? Where are you located?

[@applepietech]

Yes. North Port FL. Applepietech.com

[@jahknowstar4714]

I want to pay you for online classes is that possible? Because I really want to learn from you

[@applepietech]

Sorry, don't do any classes at this time. Thank You for Your feedback, appreciate it!

[@DjPTL]

I would also pay for those classes.

[@jailbreak7750]

how to no display and no backlight?no output 44v capashitor 😂