Search results

  1. Sykulski

    [SOLVED]820-3437 - Fan spins, No chime, No image on screen

    Yes. From the beginning there was no R6102 because it was burned away together with the trace to C6100. So I replaced R6102 and C6100 and made a trace with battery wire between them. R6102 measures 99.8KΩ and continuity to C6100 and U6100/p7,8 is ok. I've got 3.3V on R6102/pin1 and 3.0V on pin2
  2. Sykulski

    [SOLVED]820-3437 - Fan spins, No chime, No image on screen

    Diode mode with resistors R6114-17 removed: R6114: p1 = 0.735, p2 = 0.484 R6115: p1 = 0.736, p2 = 0.515 R6116: p1 = 0.735, p2 = 0.515 R6117: p1 = 0.735, p2 = 0.505
  3. Sykulski

    [SOLVED]820-3437 - Fan spins, No chime, No image on screen

    Hi Duke Do you have any new advice to this one?
  4. Sykulski

    [SOLVED]820-3437 - Fan spins, No chime, No image on screen

    No problem. Pin1: 0.501 Pin2: 0.480 Pin5: 0.514 Pin6: 0.514
  5. Sykulski

    [SOLVED]820-3437 - Fan spins, No chime, No image on screen

    OK. Diode mode. R6114-17 removed. U6100 still off board Pin1: 0.501 Pin2: 0.480 Pin7: 0.468 Pin8: 0.408
  6. Sykulski

    [SOLVED]820-3437 - Fan spins, No chime, No image on screen

    Diode mode U6100 (off the board) Pin1: 0.497 Pin2: 0.477 Pin3: 2.017 - (should this be so high? R6101 = 3.3KΩ, diode mode pin1 = 0.412) Pin4: 0.002 Pin5: 0.508 Pin6: 0.508 Pin7: 0.462 Pin8: 0.408
  7. Sykulski

    [SOLVED]820-3437 - Fan spins, No chime, No image on screen

    No liquid or signs of it on clock chip. Switched it anyways. Issue persists :-(
  8. Sykulski

    [SOLVED]820-3437 - Fan spins, No chime, No image on screen

    I removed J6100 from board. All resistors around U6100 measure correctly according to schematics. Still same issue.
  9. Sykulski

    [SOLVED]820-3437 - Fan spins, No chime, No image on screen

    I have this 820-3437. Liquid damage around SPI U6100. Burned trace between R6110/p2 and R6120/p1 fixed. Burned trace between R6102/p1 and C6100/p1 fixed. R6102 was replaced. The fan is spinning but does not make the usual three times cycle. It starts spinning for 6-8 seconds. Then stops. Then...
  10. Sykulski

    820-3662 intermittent shutdown again

    I replaced C1102/3. It did not resolve the issue. Computer still turns off spontaneously with same symptoms. Any other ideas ?
  11. Sykulski

    820-3662 intermittent shutdown again

    I did not have time yesterday or today. Will replace them tomorrow and follow up afterwards.
  12. Sykulski

    820-3662 intermittent shutdown again

    Hi. I got one more MacBook Pro 15 Late 2013 which shuts down intermittently again. It has exact same symptoms when shutting down as this one: https://www.rossmanngroup.com/boards/forum/board-repair-troubleshooting/7110-820-3662-intermittent-shut-down Can work for long time (several hours) or...
  13. Sykulski

    iPhone 5S stuck in DFU

    Hi. I got this iPhone 5S in for data recovery. I can not kick it out of DFU mode. I normally don't fix phones so I really need a hint here. After searching Google I tried keeping both buttons pushed in and tried some software tools (Recboot, Reiboot, Wondershare, Mobisaver). None of them works...
  14. Sykulski

    820-3437 - Loosing half charge over night in sleep mode

    No it was not messed with. I was the first one opening this for sure. Serial # is correct. Customer told me he left it by an open window and it rained onto it for a little while. After this he could not turn it on and brought it to me.
  15. Sykulski

    820-3437 - Loosing half charge over night in sleep mode

    Inspected very closely for corrosion. Did not find anything. Looks perfect. UC'ed it. Put the MLB in another fully working machine. Battery still draining in "sleep-mode" I lost against this one :-(
  16. Sykulski

    820-00138 CPU VCC question

    Thanks. Not trying to argue. Was just surprised it could even start without it. I will check another display and if lines disappear I think I will dump this one as the customer most likely will not pay for both new display and new battery and the motherboard repair. Thanks again Duke.
  17. Sykulski

    820-00138 CPU VCC question

    Ok. But it boots and run fine without the U7320. Vcore is 1.78V and stable. Then what makes this chip so VERY important? Is this vcore a little too low? Schematics says it should be 1.85V. Just curious...
  18. Sykulski

    820-00138 CPU VCC question

    OK. But do you think the almost invisible lines on display are caused by this or the display maybe also can be faulty ?
  19. Sykulski

    820-00138 CPU VCC question

    Hi. I got this one in with a good amount of coffee inside. I UC it but it did still not turn on. Found a short in the U7320 (PHASE 2 / CPU VR12.5 VCC Power Stage). I removed the chip and computer now boots without it. Battery does not charge but it is because of the battery itself is damaged...
Top