[Mwahab]

You need to identify the MCU type
Search for it in vvdi MCUs
If you are lucky it should be there
Trace the points from mcu legs to nearest pcb soldering points. (If its non bga)
Try to read.
If its ok to handle losses you are good to go, if not, don’t touch it
I understand why some people don’t share these schemes, because it really takes alot of time and effort.
Sometime you work alot and u don’t reach anything, or end up with non profitable or non interesting findings.