Asus P526 Service Manual page 33

a. First, please check the LCM connector is good or not.
b. R172 (GP138_LCM_PWR_EN) shall be high (2.8V).
c. R208 (LCM_VDC) and R209 (LCM_IOVDD) shall be 2.8V.
d. R95 (LCM_RST#) shall be high (2.8V).
e. Pin#27 (LCM_SPI_SCL), pin#29 (LCM_SPI_SDIO) and pin#30 (LCM_SPI_CS#) of CON6
shall have correct 2.8V SPI signals.
f. Data signals LCD_D0_B0 ~ LCD_D15_R4 (LCM_D0 ~ LCM_D15) shall have correct signals
(high –> 2.8V, low –> 0V).
GTC ■ Service Manual