⚠️ Most “free” schematics online for this model are either incomplete, wrong, or malware-laden PDFs.
If the LCD is intact but the screen remains black, the issue is likely a blown backlight IC or a broken track on the motherboard. The schematic diagram for the Y7 2019 highlights the , distinguishing between the display data lines (MIPI lanes) and the backlight anode/cathode (+LED and -LED). You can measure the 19V to 25V on the backlight capacitor to verify the circuit is working. Huawei Y7 2019 Schematic Diagram
Technicians use the diagram to trace the VBUS and VBAT lines from the charging port through the charging IC to the battery, often replacing components like the charging thermistor. ⚠️ Most “free” schematics online for this model