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Before going 100% of board internal damage what would you do to give it one more try?

Can I buy from that link is that the correct chip right? I will follow flash procedures when it arrive!

Where you go first to try to solve this machine? I need to solve it ASAP Please help me check what is possible to bring it to life!

https://es.aliexpress.com/item/1005002748887534.html?spm=a2g0o.productlist.main.1.58082172zg5RKK&algo_pvid=76975dd5-cc05-4821-b801-fccf57337b77&algo_exp_id=76975dd5-cc05-4821-b801-fccf57337b77-0&pdp_ext_f=%7B%22sku_id%22%3A%2212000021955805261%22%7D&pdp_npi=3%40dis%21BRL%2141.03%2141.03%21%21%21%...

With a brand new can I make the macbook turn on again and back to life?

Searching for 820-0050 BIOS only results for CH341 and alike. How to find the IC on Aliexpress? U4770 also didn't return anything

I cannot believe enough heat to solder a nand would destroy traces underneath the board. In this case would be almost impossible to solder and desolder NANDS IC's I really need to save this board! Please advise me as much as you can PLEASE!!

It worked perfectly using the black board it read and write I put everything back and still same error. Is there a way to buy a brand new BIOS and to program it to this computer? I think this BIOS is trash

I did not damage the cap i knocked it when lifting the NAND itself The gnd pad of this cap on the board was broken Do you think the HEAT could be the problem? but this area only have the NAND and small caps with black glue around

Yes CH341 detects read and write an A1278 bios image attached

I soldered the two original NANDS removed CD454 which has GND pad broken on the board itself Still no behavior at all Yes I tried DFU using another macbook and the cable connected and doing that keyboard thing to enter DFU. It does not enter DFU. What can I do from now? I dont think I heat...

By the way I reballed and resoldered each of the 4 NAND IC which was going to be the upgrade to 512GB still no behavior at all. THEN I reballed and resolder back only the 2 ORIGINAL IC (128gb) and still no behavior at all I remove the original nand without breaking any pad, I guess I did it...

There is 1.8V @ pin 8 on the black board Its gives these images I do not have any SOP-8 1.8V SPI chip to test without blackboard. Since it has 1.8V on pin 8 do you think the black board is damaged?

I just bought another 1.8v adapter and the behavior is the same itself. It gets a bit hot on the 1.8v IC thing But still error detecting the eprom What could it be? The black board itself?

I think its the adapter I just noticed the IC on the adapter itself is getting really hot. The position that you told me is the right one, ok? How about that jumper on the CH341 its default when I bought it... Is it right?

OK Soldered PIN 1 to that CIRCLE (image attached) on the black board and assembled everything as I mentioned here and you confirm as right However it does NOT detect EEPROM (image attached) The CH341 is properly installed with driver and its working on windows. (image attached) Whats wrong?

By the way I removed two of the four IC (which I think I didn't solder properly) and only resolder two of them. Even tought I bought 512GB total (4 NANDS) soldering two of them is it possible to have any behavior? Like apple logo?? Chime?? Question mark folder?? Please give me as more detail...

Without HD in a Macbook A1278 you have apple logo / chime and then question mark folder WHY on this model is that different? Can you confirm for me if any behavior happen without NANDS? Without them it will be easier to check what could I have done to make the machine NOT turn on at all right...