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Problem solved after connector replace. thank you .

Thanks for help duke but also replaced io board +flex cable but nothing changed. Only i m not sure connector is ok ( looking pins corrosion cleaned but but sure) have you Ever changed this connector? (i/o board connector)

Hi Board was repaired 2 months ago ( liquid damaged a lot of place, ultrasonic cleaned and reballed SMC every thing was ok) but computer came back with fan noise and too slow. ASD report an error like bottom, SMC: 0x0 (test #1) - SMC Critical Sensor Check Test - Checks if the SMC...

Thank you aprendiz your question solved problem:) Voltage is 1.4V and checked R6905 and it must be 10ohm but 4.5Kohm shows replaced and everything is ok.

Hello I have 820-3208 come with liquid damage around SMC and SPI. After ultrasonic clean measure PP3V42_G3H 1.8V. Checked U6990 no corrosion . R6995 ,R6996 checked fine, when i injected 3.42V PP3V42_G3H fan spin and dong noise ok. ( didnt checked screen yet) Where around can i start?

Thank you :)

Louis are you using alcohol or another things in ultrasonic cleaning machine?

thank you duke when i injected 1.5v PP3v3 line found damaged capasitor and removed it everytings seems ok.

Thank you aprendiz. i ll try it when i find parts,3 times damaged parts all donor board is used:)

Hi Board is not turn power on,not sign of liquite , user said power off suddenly. When i check voltage PPBUS_G3H : 12.5v PP3V42_G3H: 3.42V PPVRTC_G3H: 3V PP5V_S5 : 5V PP5V_S4 : 0V PP5V_S0 : 0V PP3V3_S5: 0V U7501 is creating PP3V3_S5: 0V and PP5V_S4 : 0V. When i check this part S5_PWR_EN is...

Thanks Aprendiz when i replaced Q8030,q8031 and U8900 same time machine start to fan spin not mounted computer body and didnt connect any cable. After mount computer and connected lcd cable and other cables it stoped again :( same problem at start. 0,25 A use at powersupplay connect and nvidia...

When i check resistance to ground 32ohm shows this board but i have another same board ( not sure about healty) 27ohm shows. ( Also removed R8998,R8999,C8961,C8962,C8963,C8964) red probe at gnd.

when i out red probe diode mode 0,30 ohm shows.

Thanks for help aprendiz but I didnt inject PPVCORE_S0_GFX_REG voltage, injected PPBUS_G3H line 3.5V . And when i removed r8999 and r8998 short to ground stay another side (at PPVCORE_S0_GFX_REG line) so if q8930 and 8931 was shorted groun when i removed this resistors it have to stay short to...

Hi Board is not turning power on when i measure PPBUS_G3H shows 1.5V. Removed F7040-F7041 PPBUS_G3H is 12.5V ok. After injected 3.5v PPBUS_G3H line GPU is warming up. Then I removed R8998,R8999,C8961,C8962,C8963,C8964 GPU is not warming so GPU is dead ? And now also machine can not power on is...

I checked around PCH but looks great. After replacement PCH didnt change problem same long beep continue...

Problem is solved after reflow PCB by oven. Thanks.

Hi SMC_LID is 3.3V, if i understand correctly voltage is under 0.5V SMC_LID is enable so LCD backlight ll be close . What is problem I cant understand :( U7701,U7750 and q7706 changed from donor board.

Yes duke i can see question mark in folder. Tried another LCD assembly nothing changed.

Hello No liquid damage signs on board but backlight not working. PPBUS_SW_BKL= 0V BKLT_EN= 3.3V PPBUS_SW_LCDBKLT_PWR = 12V BKLT_EN = 3.3V LCDBKLT_EN = 12V PP5V_S0-BKLT_VDDA = 5V PP5V_S0-BKLT_VDDD = 5V try to replace u7701 and u7750 also from donor board but nothing changed:( what can i check...