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Hi, got an 820-01521 with no audio on speakers, no signs of damage. The audio Jack works but not the internal speakers. Speakers show on OS and volume bar also shows. Tired know working i/o board and flex cable, tried known working speakers. I get 1.8v on AUD_PWR_EN. I also get PP1V8_G3S...

No fan spin no light. PP18V5_DCIN_FUSE is 1.8v and ADAPTER_SENSE is 0v. Tried a different DC in board and no change. Charger is OEM and its working. F6905 has continuity. CHGR_UGATE is 0v. CHGR_LGATE is 0v R6929 is 2k ohms. Diode mode to ground: SMC_BC_ACOK = 0.427 PPBUS_G3H is 0v and...

3 = 0.719 8 = 0.643 17 = 0.482

16 = 12.5v 8 = 0v 13 = 3.4v 3 = 0v 17 = 0v 6 = 0v 1 = 0v

Hi, got a 820-3115 board that does not boot. Got green light but no fan spin. PPBUS_G3H = 12.5v PP3V42_G3H = 3.4v no PP5V_S5 and PP3V3_S5. Replaced U7200 no change. PPBUS_S5_HS_OTHER_ISNS is 12.5v 5V3V3_REG_EN is 3.3v

820-4924 that shuts down after 30secs -2min. No kernel panic error. In safe mode, SMC bypass it takes way longer to shut down. I tried another motherboard on its chasis and it didnt shut down, so external components are ruled out Voltages after shutdown = PPBUS_G3H = 12.21v PP3V42_G3H =...

It was the palmrest, after replacing it turns on and works off the battery just fine. Even though i had tested it without connecting the trackpad flex cable, so i dont really understand how is it related to the battery.

Battery alone, no start. Other charger, same thing. No charger, works normal.

No history available. No signs of water damage

It boots with the battery screw but not with the flex cable. Fan spins for a few seconds and screen flashes backlight, then shuts down. Tried several working batteries, no change. Also tried a different data cable. J6950 is not shorted. SCL/SDA lines are 0.369 diode mode to ground. Resistance...

PPBUS_G3H_R and PPVIN_G3H_P3V42G3H are both 1.1v and going down with only battery connected. R6905 is 10ohms and has continuity. Q7055 voltages with battery and charger: CHGR_BGATE= 2.5v PPVBAT_G3H_CHGR_R = 10.2v PPVBAT_G3H_CONN = 10.2v PPBUS_G3H with battery connected is 10.2v (without...

PPDCIN_G3H = 16.46v CHGR_AGATE_DIV = 6.68v PPDCIN_G3H_INRUSH = 16.44v CHGR_SGATE_DIV = 6.22v

from scrap board, but i tried 3 different ones

also tried several, and the one im currently using works fine on other machines.

Yes, tried several

PPDCIN_G3H = 19.9 DCIN_ISOL_GATE_R = 6.78 PPDCIN_G3H_ISOL = 19.9

R7012 measures correctly and its connections are good. Replaced D7010 just in case. Same issue.

They are both 3.4v but pulse down to 3.3v

Replaced Q7180, no change. R7120, R7185, R7186, R7180 measure correctly.

Yes, i doesnt do it with fake charger.