i removed quad resistor(dat0,1,2,3) but still DAT0 connected at GND
maybe
1. emmc BGA cold soldering
2. PCB crack
3. soldered itself by hot(?)
solution
1. remove bonding and reballing emmc chip (hardest)
2. connect another emmc chip (simple)
3. capture X ray(???)
i will try 2(new emmc)