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https://drive.google.com/drive/folders/1LAIOQ_KmtSd16uVYzcPhsclQXO5HrGxe?usp=sharing I don't find any knocked-off components or a soldering issue, Please help me if you observe something with my soldering.:(

You mean the CPU gone bad? Should I check any other signals to make sure the CPU functionality? Will it make sense cleaning me region?

I have resoldered all the three IC's properly,,,,, Now different behavior, PPVCC_S0_CPU_REG is 0V. The fan is running, Board is not booting.

I have used a hot air gun with a 500 deg temperature to remove the IC, the Same for soldering also... can I try to add more solder lead using a soldering iron. Yes, I have removed the CPU heatsink before doing the rework.

Yes, I have soldered them, Is there a way I can make sure I have soldered all three of them properly? Because I can see 1.33V at the output, One out of three-chip is heating up too much...

I have changed all the three FDMF6808 from mouser, Now I get only 1.3V on its output , Laptop is not powering ON , Fans are running

I was randomly checking the voltages on L7410 /20/30 when the machine in ON condition. All the three voltages were unstable, I could see some 300 mV coming and going...

Monitor doesn't show any junc values , Where can I find the track pad info in system report? I know track pad is working properly

Yes , That's how I have tested the external SSD (With BIG SUR), I was disconnected J9600

Yes I have tested with known working battery.... Does it make sense varifying all the voltages/ current consumption?

To be honest, the board looks new, There is no chance of corrosion, Should I really do the BGA heating? Would be related to some sensor?

yes

Could you specify which BGA's are suspected?

Just a doubt, I don't see the fans running while booting/after pressing the power button, Is it normal? But the fans are functional when I run diagnostics test

Yes , I have reinstalled the macos to internal SSD , Its took long time to do it , But Didnt help at all

Yes I agree with you it has something to do with heat example ..... When I power up its goes to two different scenarios Scenario1- it goes to loop with a chime sound. When it is in the loop I can see the backlight. Just before going to loop it shows the apple logo, Apple logo shows only if i...

MAC - os -booted with external SSD - Doesn't help

PRAM reset - Yes doesn't help ME clean - Yes, Doesn't help ALS - The brightness of display working through touch bar Fsys checksum - I wasn't, Just did now, It's reported no change...... Doesn't help

When I got a working image I have programmed the flash image, The system doesn't give a wifi selection window... Just it not booting and not going to boot recovery window

Hardware diagnostic mode test passed without any error , External LCD doesn't help, Same too slow..... What is stands for ALS?