Locate the precise small via-holes or surface-mount resistors corresponding to . These are located just off the edge of the memory chip shield.

Remove the SIM tray and carefully unclip the rear plastic back cover. Unscrew the logic board protection shield.

Are you powering the motherboard via or via a USB cable ? Share public link

Technically yes for reading/writing, but without proper voltage level shifting (1.8V), you will destroy the eMMC. A dedicated ISP box is strongly recommended.

STK-L21 ISP Pinout: A Complete Guide for Huawei Y9s (2019) Repair When dealing with a hard-bricked Huawei Y9s (STK-L21) Go to product viewer dialog for this item.