820-3115 - no video & Backlight

[McAllan]

Hi,

I've got a 820-3115, no display, no backlight. Have tested the LCD onto another machine and it is working.

Voltage measured on U9000 with LCD connected.
LCD_IG_PWR_EN : 3.28v
PP3V3_S5_LCD : 3.28v
PP3V3_LCDVDD_SW : 0.15v
Resistance mesure at pin 2&3 with LCD : 4.62k
Resistance mesure at pin 2&3 without LCD : 81.7k

Have replaced U9000 twice but PP3V3_LCDVDD_SW still at 0.15v

I think LCD is being detected as testing without the LCD connected, LCD_IG_PWR_EN drops to 0v

Any advise.

 

[2informaticos]

Do you get USB activity?

Check L9008/80.