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  1. D

    820 3332 No GPUVCORE

    Was the board already messed with. Missing GPUVCORE_EN is not something that happens normally.
  2. D

    820-00928-A Schematic and Boardview

    Don't hijack an old post! Make a new one.....
  3. D

    820-2779 - No backlight on LCD

    27V is not possible! Especially not when the fan is not even spinning. How are you measuring this?
  4. D

    820-4924 no keyboard

    Diode mode on all pins of trackpad connector?
  5. D

    820-00244 stuck in chime boot loop

    Connect external keyboard and get into boot menu and boot from external source. Corrupted SSD can make machine reboot.
  6. D

    820-3662-a chime loop

    44v would indicate an open circuit so if the LCD works on another machine the connector is probably bad. The lines and garbage on external would still indicate a RAM or CPU issue.
  7. D

    Why the 821-1480 and 821-2049 Hard Drive Cables Die

    Heat it after bending to anneal it. But whatever just put a new cable in it and just be happy. Change it again after a year and make money again :)
  8. D

    [SOLVED]820-3462 IC0R error

    Seems like all analoge inputs to the SMC are reading wrong. Common problem is the AVREF voltage is wrong so ADC converter in SMC will not work right. Check PP3V3_S5_AVREF_SMC and U5010 area.
  9. D

    820-3437 fan spin no boot/chime

    LPC is certainly needed, so probably a short in the board :(
  10. D

    [SOLVED]820-3437 All rails present, fan spins, no display, doesn't boot, CPU not getting hot

    Yeah U1950 is a good suspect.
  11. D

    820-00045 no display

    The usual common 00045 issue. I have no idea what it is at this time. If you want to experiment start with swapping out U4700, the common failure on these.
  12. D

    Early 2013 macbook pro Retina

    I would first try another LCD to make sure that is not the issue. Then inspect for liquid damage.
  13. D

    820-2838 greenlight, but no fanspin

    Voltage on the RTC crystal? You are shorting the power pads to try and turn it on? Does the light turn orange when battery connected?
  14. D

    [SOLVED]820-3330 Brain dead... or zombie at least

    Ah, so there was an issue on CPU Vcore. I'm pretty sure the CPU was damaged when that happened :( RIP.
  15. D

    820 3332 No GPUVCORE

    Does it even chime?
  16. D

    820-00244 stuck in chime boot loop

    What is getting warm? These boards should not really get warm very fast. I have seen them with bad CPUs that get very hot fast.
  17. D

    [SOLVED] 820-4924 Turns on then off right away

    Disconnect everything and try a known good LCD. Or just swap the board in a complete known good chassis/LCD. Another SSD too of course.
  18. D

    [SOLVED]820-00165 no boot/chime

    Crap under SMC or damaged traces/resistors to U6100. I assume you removed J6100
  19. D

    820-00045.. another one sodomized

    If it does a PRAM reset you should be able to get into the boot menu. Inspect the TP/KBD connector on the board. If there is no keyboard/mouse connected OSX should pop up with the bluetooth assistant to connect a BT KBD/mouse.
  20. D

    820-2779 - No backlight on LCD

    Look at schematic and tell me what voltage should be there. Pretty impossible to have 27V there and if it is really there then it is VERY bad.
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