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  1. L

    820-3332-A

    Hi Did u8900 and replaced battery. All happy now. Cheers.
  2. L

    820-3209_A Backlight

    PP5V_S0 5v BKL_FSET 3.3v PP3v3_S0 - pulses 0 - 1.2v
  3. L

    820-3209_A Backlight

    PPVout is 2.23v
  4. L

    820-3209_A Backlight

    Sorry about the delay, I have been in hospital getting my appendix removed! All good now :) F9700 has voltage on both sides. 8.4v (no battery or screen connected) Q9706 P1,2,5,6 - 1.84v P3 8.07v P4 8.37v
  5. L

    820-3332-A

    Computer appears to start, then trips out. Bench PSU shows draw from .25ma to approx 1amp after 1 second. which then resets and starts again. Client says it sometimes turns on normally. Some kind of over voltage protection or a shorted component tripping a circuit? Not sure where to start...
  6. L

    820-3662-A no Brain

    Hi Sorry for the long delay. I have been in hospital having my appendix removed. I replaced U7600, however before i had time to properly check all the output pins etc I must have shorted something because I smelt the bad smoke and now the laptop won't turn on. Looks like it's back to the...
  7. L

    Donor Boards

    https://boards.rossmanngroup.com/threads/tons-of-untouched-clean-boards-for-sale.55554/
  8. L

    820-3662-A no Brain

    We replaced R7601 and now have 5v at pin 13 PP1V05_S0 has 300mv. ppvin_s5_hs_computing_isns 12V P1VO5S0_DRVH - 300mv ..................... DRVL 0v. .......................... LL 300mv ..................... . VBST 5v P1v05S0_Boot_RC drops to 300mv after C7630 P1V05s0_EN 5v Replaced C7630...
  9. L

    820-3662-A no Brain

    U7600 - input voltages missing PP5V_S0 - 5v PP5V_S0_P1V05S0_VCC 0v Am I correct in my reading of the schematic that the supply for "PP5V_S0_P1V05S0_VCC" is PPv5_s0 ?
  10. L

    820-3662-A no Brain

    Sorry .. I realize now that there must be power coming from u7200 CPUVR-Pgood so the issue lies elsewhere I think?! CPUVR_VDD 5v CPUVR_VIN 12.75v PP3v3_S0 - 3.5v PP1v05_S0 -.422v PP1v5_S0 - 1.508v PPVTT_SO_DDR 0v
  11. L

    820-3662-A no Brain

    Hi Computer turns on, no chime, keyboard light or video. Tested CPU power coils 0v. ALl SYS PWRGD 3.5v PP3V3 S0 us 3.5v however I get no voltage at 2 of R1950 - should I replace this resistor? (CPUVR PGOOD) Cheers James
  12. L

    Mac Mini Fan Connector - No Pads - 820-3228-B

    Hi All, Does anybody have schematic for the above computer? Also can anybody recommend an alternative wire for running leads ? I can't find anything locally (Australia) and many Amazon sellers don't ship to Australia. https://store.rossmanngroup.com/jumper-wire-thick.html
  13. L

    820-3209_A Backlight

    What fun says Louis! I've read the sticky on the home page. I WAS getting 8.5 v out at baclight but now 0. BKLT_EN_DIV 8.07v S0_LCDBKL 8.34v No power on Pin 1,2,5,6 for Q7906 BK_EN 5v
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    What would YOU find valuable in an industry trade association?

    Hello Louis, I saw your video on this topic yesterday! For it to be valuable to us long term the association / accreditation process would have to do at least one of two things... 1. Give us skills to do work we currently are not able to do 2. Deliver us customers we currently do not get...
  15. L

    A1708 EMC 3165 - 820 00840 A - Intermittent no Screen / Backlight

    BKLT_EN_R sometimes seems to drop to 0v with corresponding drop on backlight circuit from 45v to 12v I'll test with another screen, sorry. I don't have them lying around yet like you guys do for testing!
  16. L

    A1708 EMC 3165 - 820 00840 A - Intermittent no Screen / Backlight

    BKLT_EN_R retested 3.5v. L8410 is still 12.45
  17. L

    A1708 EMC 3165 - 820 00840 A - Intermittent no Screen / Backlight

    LID_OPEN 3.5v SMC_LID LEFT 3.5v SMC LID Righ 160mv HALL_SENSOR_RIGHT 160mv (audio flex not connected so I assume this is the reason for low value?) BKLT_EN R 2mv
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