let's close the topic about testpoint in bga 221.testpoints in these chips are present. some need to be closed to "ground", some need to feed "vcc". The problem is that the firmware for each chip is "signed." If you read the firmware with a working chip, and write to another good chip, then the chip will die. At the moment there is no solution to this problem. As there is no solution for flashing any chips other than the Samsung brand.
