Schematic Redmi 13c Extra Quality -
The Redmi 13C is prone to "LCD Black" after a heavy drop. Using the schematic, locate the (usually U400). The extra quality PDF shows that pin 3 of U400 expects LCM_BL_EN (2.8V). If missing, you can jumper a 1K resistor from VIO18 to this pin to force the backlight on temporarily.
Redmi 13C Schematic: A Deep Dive into Professional-Grade Board Repair schematic redmi 13c extra quality





