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  1. tlough75

    820-00138 Customer used knock off charger

    I forgot to conform they were ok after I changed the ISL. SO be 20.2 Ohms, Won't forget this time. I just hope nothing else is blown. I may use a donor ISL this time to test.
  2. tlough75

    820-00138 Customer used knock off charger

    I took them off the board to confirm. R7121 is "Open" and R7122 is 9.2K, so I would say they are bad as well
  3. tlough75

    820-00138 Customer used knock off charger

    oops, yeah. R7121 is reading 625M and R7122 is 9.2K Will replace all three and report back. Weird thing happened too, when I turned it on something "popped" on the other side of the board.
  4. tlough75

    820-00138 Customer used knock off charger

    So I replaced U7100 and it sounds like it blew again. The computer now turns on, but the resistance between 27 & 28 is .5M Ohms.
  5. tlough75

    820-00138 Customer used knock off charger

    So I have on the bench an 820-00138, and the customer stated their customer used a knock off charger. The charger melted and now machine is dead. I have it on the bench and it is drawing 20mA, PP3V42 is preset but PPBUS is 4.2V. I measured pins 27 & 28 on U7100 and have 30K ohms, with pin 28...
  6. tlough75

    820-00928 No Recognizing SSD

    Thank you for your reply. I ended up giving back to client as is was not worth the risk. They said they will send to Apple. Appreciate the help
  7. tlough75

    820-00928 No Recognizing SSD

    as soon as it cools off back to blinking ? folder
  8. tlough75

    820-00928 No Recognizing SSD

    still not seeing internal ssd
  9. tlough75

    820-00928 No Recognizing SSD

    so it is not fully working but we are onto something
  10. tlough75

    820-00928 No Recognizing SSD

    I can see the login screen but that is it
  11. tlough75

    820-00928 No Recognizing SSD

    oh my god!!!! I heated the nand and it freaking worked!!!!!!
  12. tlough75

    820-00928 No Recognizing SSD

    What do you mean heat? Reflow, or just warm them up? They all have that underfill crap around them.
  13. tlough75

    820-00928 No Recognizing SSD

    Spent 30 min going through every voltage on that page, checked every capacitor, resistor and trace. Didn't see anything out of the ordinary.
  14. tlough75

    820-00928 No Recognizing SSD

    SSD_PGOOD_L is 1.8V
  15. tlough75

    820-00928 No Recognizing SSD

    PP3V3_SSD_NAND is 3.3V
  16. tlough75

    820-00928 No Recognizing SSD

    PP3V3_SSD_NAND is 1.2v
  17. tlough75

    820-00928 No Recognizing SSD

    Ok, Cover on J9600 is in place and the screws are tight and when I boot to external, disk utility does not see the internal SSD. Will have to figure out what SSD rails to check.
  18. tlough75

    820-00928 No Recognizing SSD

    So I have an 820-00928 that is not recognizing the SSD. The customer states they were just working and it stopped working. The computer turns on but has a flashing ? folder. I took out the board and do not see any signs of corrosion or broken probe points. Any Ideas where to look?
  19. tlough75

    820-3115 No light, but powers on

    LOL I use Amtech 559 bought from store.rossmann.com.
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