Hello Everybody
Working on 820-3662 backlight problem. no liquid damage ..
PPBUS_SW_BLK 0V
PPBUS_SW_LCDBKLT_PWR 12.5V
LCDBKLT_EN_L 12.5V
PPBUS_S0_LCDBKLT to ground resistance is 5.4 Mega ohm
BKLT_EN_R 3.3V
Also replaced , J8300,Q7706,L7710,D7701,Q7701,U7701,U7750
Tested known good LCD, I can hear chime and see dark screen. Any idea for next step?
Working on 820-3662 backlight problem. no liquid damage ..
PPBUS_SW_BLK 0V
PPBUS_SW_LCDBKLT_PWR 12.5V
LCDBKLT_EN_L 12.5V
PPBUS_S0_LCDBKLT to ground resistance is 5.4 Mega ohm
BKLT_EN_R 3.3V
Also replaced , J8300,Q7706,L7710,D7701,Q7701,U7701,U7750
Tested known good LCD, I can hear chime and see dark screen. Any idea for next step?