had a 820-3476-A board,status as below
Machine has no water damage history
machine was fully functioning (our own board actually),used to test on another machine.
One junior came,take the board,put into one machine which has history of water damage,can't turn on but all corroded part replaced / cleaned properly
fan spin,display was there,suddenly turn to black,and when turn off,and on again,still black,and when open the bottom cover,unplug battery,plug in charger,notice the fan can spin when its on but still no display and no chime
status of this board :
PPBUS_G3H at pin 1 R7005 = 12.55v
PPBUS_S5_HS_COMPUTING at pin 5 Q7310 = 12.55v
PPBUS_S5_HS_OTHER5V pin 2 Q7520 = 12.55v
PPBUS_S5_HS_OTHER3V3 pin 2 Q7560 = 12.55v
PPDCIN_G3H_ISOL pin 1 R7020 = 16.22v
PP3V42_G3H pin 13 U1900 = 3.404v
PPVRTC_G3H pin 1 U1900 = 3.331v
PP5V_S5 pin 29 U7501= 5.15v
PP5V_S4 pin 2 U4600 = 5.16v
PP5V_S0 pin 6 U7310 = 5.14v
PP3V3_S5 pin 2 U1900 = 3.33v
PP3V3_S4 pin 4 U4850 = 3.33v
PP3V3_SUS pin 8 U6100 =3.31v
PP3V3_S3 pin 1 R5370 =3.33v
PP3V3_S0 pin 1 R5361 = 3.330v
PP3V3_S4SW_SNS = 3.31V
PP3V3_S0SW_SSD_FET pin 6 U8070 = 3.331V
PP3V3_S4_TBT pin 1 C2951 = 3.326v
PP1V35_S3_CPUDDR pin 1 C1060= 1.358V
PP1V35_S3 pin 2 U7400 = 1.359V
PP1V05_SUS pin 1 R1890 =1.038V
PP1V5_S0 pin 2 L7870 =1.51V
PP1V05_S0 pin 4 U8005=1.043V
PP1V05_S0SW_PCH_HSIO pin 1 L1290 = 1.038V
PPVCC_S0_CPU pin 2 L7320 =1.74V
any other rail that i should check?
Machine has no water damage history
machine was fully functioning (our own board actually),used to test on another machine.
One junior came,take the board,put into one machine which has history of water damage,can't turn on but all corroded part replaced / cleaned properly
fan spin,display was there,suddenly turn to black,and when turn off,and on again,still black,and when open the bottom cover,unplug battery,plug in charger,notice the fan can spin when its on but still no display and no chime
status of this board :
PPBUS_G3H at pin 1 R7005 = 12.55v
PPBUS_S5_HS_COMPUTING at pin 5 Q7310 = 12.55v
PPBUS_S5_HS_OTHER5V pin 2 Q7520 = 12.55v
PPBUS_S5_HS_OTHER3V3 pin 2 Q7560 = 12.55v
PPDCIN_G3H_ISOL pin 1 R7020 = 16.22v
PP3V42_G3H pin 13 U1900 = 3.404v
PPVRTC_G3H pin 1 U1900 = 3.331v
PP5V_S5 pin 29 U7501= 5.15v
PP5V_S4 pin 2 U4600 = 5.16v
PP5V_S0 pin 6 U7310 = 5.14v
PP3V3_S5 pin 2 U1900 = 3.33v
PP3V3_S4 pin 4 U4850 = 3.33v
PP3V3_SUS pin 8 U6100 =3.31v
PP3V3_S3 pin 1 R5370 =3.33v
PP3V3_S0 pin 1 R5361 = 3.330v
PP3V3_S4SW_SNS = 3.31V
PP3V3_S0SW_SSD_FET pin 6 U8070 = 3.331V
PP3V3_S4_TBT pin 1 C2951 = 3.326v
PP1V35_S3_CPUDDR pin 1 C1060= 1.358V
PP1V35_S3 pin 2 U7400 = 1.359V
PP1V05_SUS pin 1 R1890 =1.038V
PP1V5_S0 pin 2 L7870 =1.51V
PP1V05_S0 pin 4 U8005=1.043V
PP1V05_S0SW_PCH_HSIO pin 1 L1290 = 1.038V
PPVCC_S0_CPU pin 2 L7320 =1.74V
any other rail that i should check?