Search results

  1. S

    820-4924 no PPBUS_G3H

    Q7010 had a bit of corrosion on pin 4. Replaced it now i get fluctuating PP18V5_DCIN_FUSE from 16.v to 12v
  2. S

    820-4924 no PPBUS_G3H

    Replaced Q7180 just in case, no change. R7121/2 10 ohms each. Resistance between pins 27 and 28 is 20.8ohms
  3. S

    820-01041 no boot

    Removed U9080 and still 0.030 on PPBUS_G3H_SSD0_SNS Removed R5620 and i get 0.03 on PPBUS_G3H and 0l on PPBUS_G3H_SSD0_SNS Removed F7000/F7001, the issue is on the side of generation
  4. S

    820-4924 no PPBUS_G3H

    PPBUS_G3H is 0.5v, diode mode to ground is 0.113. removed F7140, PPBUS_G3H is 0v. Removed L7130 still no PPBUS_G3H PP3V42_G3H diode mode is 0.256 U7100 basic voltages (F1740 and L7130 removed) 1 = 0v 2 = 16.5v 3 = 4v 9 = 0v 12= 0v 13 = 0v 14 = 0v 15 = 0v 17 = 0v 19 = 5.5v 20 =...
  5. S

    820-01041 no boot

    L9080 diode mode is 0.316
  6. S

    820-01041 no boot

    820-01041 with tiny bit of corrosion on C9081. I thought it was the usual shorted C9081 but diode mode on PPBUS_G3H_SSD0_SNS is giving me 0.036 and resistance to ground is 80ohms But after removing C9081 i still get 0.0036 diode mode on PPBUS_G3H_SSD0_SNS. U9080 culprit?
  7. S

    820-3476 green light no turn on unstable PPBUS

    removing F7140 makes PPVBAT_G3H_CHGR_REG stable, so i guess there must be a short upriver. I couldnt find any shorts around U7501
  8. S

    820-3476 green light no turn on unstable PPBUS

    820-3476 that originally had green light and 3.4v on PP3V42_G3H but 0v on PPBUS_G3H. I determined L7130 to be faulty. After replacing L713 i get 12.55v on PPBUS_G3H but pulses down to 12.00v and still no boot. With battery only PPBUS_G3 is stable at 11.84v but still no boot. Battery +...
  9. S

    820-0281 not turning on

    I need some help with this. Im stuck dont really know what i should be looking for next
  10. S

    820-3662 no green light no boot.

    D7010 is not shorted R7180/81 R7185/86 all measure good. Voltages around Q7180 area: PPDCIN_G3H = 3.1v DCIN_ISOL_GATE_R = 3.0v PPDCIN_G3H_INRUSH= 0v CHGR_SGATE_DIV = 0v CHGR_AGATE_DIV =3v
  11. S

    820-3662 no green light no boot.

    820-3662 with tons of corrosion. It has no green light and no fan spin. PP20V_DCIN_FUSE is 3.1v (using OEM known working 85w charger) Replaced Q7180 and D7010, no change. Diode mode on PPBUS_G3H is 0.400 and PP3V42_G3H is 0.275
  12. S

    820-0281 not turning on

    Sorry, i misunderstood the question. resistance over C7020 is 3 ohms and C7023 is 3.3 ohms
  13. S

    820-3476 not booting completely and not recognizing the battery

    It was the ISL, even though it was drawing almost 1 amp at 4v it wasnt generating noticeable heat. I removed it just in case and the short was gone. Thanks a lot.
  14. S

    820-3476 not booting completely and not recognizing the battery

    Sorry, i had an error in the tittle. It recognizes the charger all right. The battery is whats not recognized. Diode modes: SCL: 0.00 SDA: 453 SMBUS_SMC_5_G3_SCL is shorted. I removed D7050 but no chanage. Could it be shorted under J7050?
  15. S

    820-3476 not booting completely and not recognizing the battery

    It turns on and it will load the bar to 100% but it wont go into the OS. Sometimes it turns on keyboard backlight and caps light, but no login screen. (tried several SSD´s) Tried with everything disconnected, no change. It wont load MacOS install USB neither. NVRAM and SMC reset do nothing...
  16. S

    820-0281 not turning on

    Yes, i removed both F7000 and F7001 resistance over C7020/23 is 130k ohms
  17. S

    820-0281 not turning on

    I measured every line in U7000 in diode mode but its the same as good board. Replaced both Q7030/40 just in case but still nothing. Could it be the SMC?. Here are the diode mode measurements: Good Bad TBA_GATE_Q4 0.686 0.714 TBA_VDDA 0.405 0.398 PPVBAT_G3H_CHGR_REG 0.384 0.38...
Top