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Hi 2informaticos, Thank You for the quick response and Help...Here are some measurements I took.... C7020 3.4 ohm C7923 2.6 ohm SMC_DCIN_VSENSE...Getting 2.6V R5498= 31.5k pin 1 20V / Pin 2 2.6V R5499=4.7k C5498 = 4.7.4K SMC_PPBUS_VSENSE... 0.00V R5488=27.4K R5489=5.5K C5489=5.4K Q5490...

Hi Guys, I am working on a Customers 820-00928 board that will not power on and shows Low Battery icon. Machine Boots up in SMC Bypass Mode but does not see any battery? PPBUS_G3h is 13.02V With Battery Connected while running in SMC Bypass mode and PPBUS_G3h is 12.58V while machine is off and...

Thank You Informaticos2, I Noticed BKLT_PLT_RST_L did not have Continuity between Pin 2 Of Q7707 and TP(1) so ran a wire and all is good now Backlight Working Perfectly. Thank You So Much for all your Help :-)

With Screen attached and powered on?

Thanks Again informatics...With Screen attached and power to the board Q7707 Pin 5 EDP_BKLT_EN shows 3.31V

Anyone have any ideas?

Here are more measurements with screen attached and power to board C7704 Pin 1 0.001V R7715 Pin 1 (BKL_EN) = 0.002V R7731 pin 2 (BKL_EN) = 0.001V R7704 Pin 2 BKL_PMW = 2.17V C7704 Pin 1 BKL_PMW = 2.17V Pin 2 = 2.17V R7714 Pin1 BKL_ISET = 0.001V C7711 Pin 1 PP3V3_S0 = 3.30V I Really Appreciate...

Okay...With screen attached and power to board I’m getting 8.56V on both sides of F7701 but 0.001V at pin 1 and pin 2 of D7701 and L7701... Also I am getting 5V on pin 1 of C7710...

Thanks for your Help 2informaticos...Does the screen need to be plugged in And board powered up to check the voltage on BKL_EN and PMW ?

XW7720 Bridge looks new still...

Hi, 2informaticos Yes there is Continuity between A5 and D7701

Hi, I have a 820-00165 that has No Backlight but you can see the image with a Light flashed from Rear. There was Corrosion under the Backlight Driver Near A5 ball so I Replaced LP8550 and Backlight Fuse but still no Backlight. ANY help will be GREATLY APPRECIATED...Thank You

Anyone have any ideas? PLEASE HELP :eek:

Thanks 2informaticos, Any chips specifically I should check? I?m not sure which ones pertain specifically to the Power supply for those 2 Lines...:(

RA902 Pin1 REGVOS_P1V8GPU 0.000V also

LA900 Both Pins also 0.000V

Also CC771 pin1 PP1V8_GPU 0.000V

Here is What I?m Getting for those 2 Power Lines... RA011 Pin2 P1V8GPU_EN -0.000V CA906 Pin1 REG_SSTR_P1V8GPU 0.000 CA950 Pin1 P3V3GPU_RAMP 0.000V RA010 Pin2 P3V3_GPU_EN 0.000V

Hi 2informaticos, Here are the Measurements you asked me to take.... LA640/50 Diode Mode LA640 Pin 1 1.5 Ohms LA650 Pin 1 1.2 Ohms UA600 Pin 35 PPVIN_S0_GFXIMVP_VIN 12.57V PIN 29 PP5V_S0_GFXIMVP_ VDD 5.1V Pin 7 PP1V8_S0_GPU -0.00V PIN 30 PP5V_S0_GFXIMVP_VDD 5.1V RA012 Pin 2...

Hi 2informaticos, I checked the Voltage on LA640/50 and I get 0.000V in all 4 Pins.