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  1. Cocobill

    MacBook Air 13 early 2015 820-00165 is slow

    Hello everyone, I got this Mac and it is on the slow side. Internet diagnostic feature shows error codes PFM006 and PPN001. Board looks clean. I replaced I/O board, nothing changed. Any ideas?
  2. Cocobill

    820-3332 no image

    Hello, I got this 820-3332 with green light OK, chime OK, no image. I know it has booted into the OS as I can hear the volume up/down adjustment sound. When I close the lid for some minutes and open it up again, I get an image and everything works fine! What do I check? The plastic cover on...
  3. Cocobill

    [SOLVED]820-3476 does not charge battery

    Hello again, an 820-3476 that does not charge the battery. There was corrosion on pins 22 23 24 of U7100. Also, a burnt trace from pin 23 to C7125. I removed the ISL, cleaned up the area, put a new ISL in, put a wire from pin 23 to C7125. It still sees but does not charge the battery...
  4. Cocobill

    [S|OLVED]820-4924-A sees but does not charge battery

    Hello, I got this logic board 820-4924-A. Minor water damage here and there, nothing crucial as it was working but not recognizing SSD. I ultrasoniced the board and the SSD and it works! Only issue, the battery is recognized but not charging. The battery itself is quite new, 11 load cycles so...
  5. Cocobill

    820-2879 Green light, quarter fan spin

    Hello, I got this logic board 820-2879. No signs of water damage. I get a green light. When shorting power pads I get a quarter fan spin and PPVCORE_S0_CPU pulses for a blink at about 0.9V. PPBUS_G3H is 12.56V. What should I measure next?
  6. Cocobill

    820-3332 green light, fans spin, no chime

    Hello, I got this logic board 820-3332, got a green light, both fans spin, no chime. I retouched the joints of U8900, nothing changed. PPVCORE_S0_CPU is 0.825V ALL_SYS_PWRGD is 3.3V PPVCORE_GPU is 0,896V Anything else to measure? Any ideas?
  7. Cocobill

    820-2850 no audio no trackpad

    Hello, I got this logic board 820-2850, replaced C9560 just to be sure, it passed EFI and OS ASD tests successfully. I installed a fresh High Sierra on an SSD and it takes 65 seconds to boot. When running, it does not appear slow, however I get no sound. Icon in the top bar is greyed out. In...
  8. Cocobill

    820-2914 green light OK, fans spin, no chime

    Hello everybody, I got a MacBook Pro 17 early 2011, 820-2914 with fans spinning that does not chime. No signs of liquid damage. PPBUS_G3H is 12.53V ALL_SYS_PWRGD is 3.3V Any ideas?
  9. Cocobill

    [SOLVED]820-3190 liquid damage

    Hello, I got a 820-3190 with liquid damage that got under a RAM chip. Also got the beeps that confirm RAM issue. I ultrasoniced the board and now I don't even get a green light. I do have a board view file but no schematic...
  10. Cocobill

    820-3332-A with no audio

    Hello, bought a Macbook Pro 15 Retina mid 2012 with damaged audio jack, internal speakers work fine. When I plug in a known good audio board 821-1548-A (headphone jack), nothing works, no internal speakers, no headphones, and I get the red light inside port. Any suggestions?
  11. Cocobill

    820-2879 Green light no start

    Hello, an 820-2879 came in with minor water damage around Q9807 area. green light OK ppbus_g3h 12.52v PP3V3_S5 OK Does not boot. What do I measure first? Thank you
  12. Cocobill

    MacBook Pro 15 820-2850 both fans pulsing every second

    Hello,, I've got a MacBook Pro 15 820-2850 board that has a green light on the charger, both fans are pulsing every second. If I keep SMC_ONOFF shorted, the pulsing of the fan occurs at twice the speed. PPBUS_G3H is fluctuating between 12.54V and 7V. I also changed the C9560 cap, did not help...
  13. Cocobill

    macbook 820-3115 water damage, quarter fan spin

    Hello, I have an 820-3115 with water damage around U6100 and U3890 areas. Cleaned up and now getting a single quarter fan spin, no loop. I started checking for shorts, but am not exactly sure what is meant by that: if I am to measure short to ground on PP3V42_G3H do I also have to measure all...
  14. Cocobill

    820-2327 short to ground on pin 2 of L7000

    Let's have a look at another 820-2327 while we're at it. This one also has a green light on the charger but no fan spin. I got to the point where I found out that there is a short to ground on pin 2 of L7000. I used a bench power supply to inject some current on pin 2 and it does not get above...
  15. Cocobill

    820-2327 water damage, ppbus_g3h low at 8.15V

    Hello guys, ancient board, I know, but still practicing. Board was clean except some mild corrosion on U7000. Replaced the chip and now I get 8.15V at pin 1 of L7000. When I plug in a good battery I get 12V on pin 1 of L7000. I short the SMC_ONOFF pads, no fan spin. What next?
  16. Cocobill

    820-2879 liquid damage, no backlight

    Hi, got this macbook with no backlight. LVDS connector around ppvout_sw_lcdbklt pins was totally burned. Replaced the connector, got backlight back but no image. Mac is working fine with external monitor via displayport. Also tried another good display, no image still. What to measure?
  17. Cocobill

    820-3115 green light OK, no boot, no chime

    Hello! got this board that worked fine yesterday and now appears dead. I've got green light in the charger, PPBUS_G3H is 12.54V, all main s5 rails are good. I did a visual inspection, no liquid damage but caps C1680, C1681, C1682 and C1683 did not look right, as if the metal part on each side...
  18. Cocobill

    [SOLVED]820-2879 green light OK, fan spins at high speed, no chime

    Hello, I managed to repair the onewire circuit on this board myself :) Now, when I plug in the charger I get a green light after about 5 seconds and the fan immediately starts spinning and goes full speed after some more seconds. No chime. I short the pads next to the keyboard connector and the...
  19. Cocobill

    820-2327 fan spinning, no chime

    Hello! An old board this 820-2327, I know, but I'm still practicing... Fan spins for 11 secs, stops for a second and then spins endlessly. I get light by plugging a USB mouse. PPCPUVTT_S0 is 1.06V. PPVCORE_S0_MCP_REG is 1.08V and SMC_MCP_CORE_ISENSE is 0.20V. What should I measure next?
  20. Cocobill

    820-2330 no green light

    Hello, new member from Greece and an absolute beginner. Thank you Louis, Duke, and the rest of the board for making this forum available to the world. I bought a complete Macbook Pro 15 late 2008 cheap on ebay with one USB not working. Measured around, replaced Q4690, nothing. C4616 was...
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