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THANKS A LOT it's very kind form you,

could you please tel me where is PP5V_S0 created please?

the little led lamp is burning but the PP5V_S0

CPU_VCC_VALSENS_N and CPU_AXG_VALSENS_N are missing but PPVCORE_S0_CPU is ok and CPU_VALSENS_P is also ok

be for i didn't have cpuvcore because of the U7400 I decided to replace U7400 and Q7510, Q7520 and Q7550 after replacing them I get 0.8 on L7510,20 and 0.3 on L7550

I've replace the U7000 with a new one( not from a downer board) because be for L7520 and L7510 had 0v.

Yes Sir when i plug a usb mouse the red light turns on ( I tried with different mouses ). And also on L7510 and L7520 I get 0.88v but on L7550 I gent 0.35v. (The L7550 is PPVCORE_S0_AXG_R)

yes I measured with known good LCD connected. and on U9000 pin one LCD_PWR_EN is missing but pin 2 and 3 are ok. and on the LCD connector pin 2 and 3 PP3V3_LCDVDD_SW_F is missing pin 6 LVDS_DDC_CLK is 3.4 pin 7 LVDS_DDC_DATA is 3,4

Sorry accidentally post it 3 times

PP3V3_S0_LCD_F on pin 4 is 3.4 LVDS_DDC_CLK on pin 6 is 3.4 LVDS_DDC_DATA on pin 7 is 3,4 on backlight fuse i have 12,4 LCD_PWR_EN is missing

PP3V3_S0_LCD_F on pin 4 is 3.4 LVDS_DDC_CLK on pin 6 is 3.4 LVDS_DDC_DATA on pin 7 is 3,4 on backlight fuse i have 12,4 LCD_PWR_EN is missing

PP3V3_S0_LCD_F on pin 4 is 3.4 LVDS_DDC_CLK on pin 6 is 3.4 LVDS_DDC_DATA on pin 7 is 3,4 on backlight fuse i have 12,4 LCD_PWR_EN is missing

with LCD assembly all the pins 8,9,11,12,14,15,17 are 0.42.

Dear I did the measurement again. pin 8,9,11,12,14,15,17 are 0.64 in diode mode

and pp3v3_LCDVDD_SW on diode mode shows 0.071

Dear sir, I measured them again on powered board with connected cable, all of these pins 8,9,11,12,14, 15 and 17 are 1.01 in diode mode

Hello, Would any one be so kind to help with this issue that i'm facing, please. A logicboard 820-3115 has green light on the charger and it turns on but there is no video. I measured : U9000 pin 2 and 3 have 3,42. and LCD_IG_PWR_EN on pin 1 is missing. L7510= 0.84v L7520= 0.84v, L7550 = 0.35v...

The L9004, L9008, L9080 are all ok. and the resistance to ground on pin 8,9,11,12,14, 15 and 17 are between 1.2 and 2 ohms

all of them 4, 6 and 7 have 3,39v (cable is not connected)

Thanks for your replay the voltage on L7510 is 0.84v and L7520 is 0.83 and L7550 is 0.34 and the usb muse turns on