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  1. Sykulski

    820-00165 fan spins - no boot

    Got this one in saying no display. After reseating the battery the machine started. Ran for 24 hours. Next day it has shut off. I tried to start it again but now it is not booting. It has no liquid. Symptoms are fan spins then stops then spins faster and faster. VCORE is ok at 1.8V all the...
  2. Sykulski

    820-4924 - Low sound after codec replacement

    Hi guys I got this 4924. It came in with no chime and no sound and no audio devices shown in audio settings. No liquid. Just stopped working one day. I opened it up and the Cirrus audio chip got a hole burned in it. So I just replaced it. This brought the sound back but at low volume. I made a...
  3. Sykulski

    820-00165 - No WiFi hardware installed

    I have this 00165 that won’t detect WiFi card. After a PRAM reset it detects and works for around 30 minutes and then goes back to not detecting. I can then make another PRAM reset and it works again for another 30 minutes and the story continues over and over. I already tried another known...
  4. Sykulski

    [SOLVED]820-3435 - Cannot locate PP3V3_S5 semi short

    This 3435 came in dead. Upon opening i see a burned hole in the battery. Disconnected battery but still not turning on on AC. Checking PBUS is only 0.9V. Q7560 getting extremely hot. After replacing Q7560 PBUS is 8.6V but still not turning on. Now PP3V3_S4 is missing (along with S4_PWR_EN and...
  5. Sykulski

    820-3332 - Kernel panic - memory

    This one makes kernel panic as soon as it starts loading OS. It gives the error: "Possible memory corruption... blaablabla..." ASD EFI fails with ERROR - Data match failed in Memory test 9, 60, 61, 62, 63, 64, 65 and 66 I reflowed the RAM. Same issue. I am not going to replace 32 pcs...
  6. Sykulski

    820-00875 - Internal screen not working

    I have this one with no image or backlight on internal screen. External screen works fine. History is customer tried to replace cracked screen (which had image and backlight but with broken LCD). He somehow replaced the screen with the power applied and now no screens are working. Also not the...
  7. Sykulski

    820-3299 - Thunderbolt not working

    This iMac came in with everything working except thunderbolt. It belongs to a professional content creator and the thunderbolt is essential part of the customers workflow as he uses it for external displays and daisy chaining external storage media. The symptoms: Both thunderbolt ports are...
  8. Sykulski

    820-000281 - Need Touch Bar connector

    Hi. I don't have a donor board and can't seem to find any online anywhere. But I need the connector for connecting the Touch Bar display to MLB. Anybody know where to find either a donor board or the connector itself ?? Preferably a donor so I could beep my way to where to bridge the burned pins...
  9. Sykulski

    820-3536 - No mouse and no keyboard (because of screen)

    Hey Duke can you explain what (rail) got fucked up here? Computer came in with mouse and keyboard freezing 2 seconds after OS loads (but working fine in boot manager) It came form an AASP who had told the customer it was a Logic Board issue. I then put a known good Logic Board into the...
  10. Sykulski

    [SOLVED]820-3437 - Sometimes working - sometimes not

    I got this MacBook Air 820-3437 Came in dead. Does not have S0 Enables. So i measure diode mode on pin4 on U8180 and it is low (around 0.065V). I injected voltage on PM_SLP_S3_BUF_L. But nothing gets hot and current draw is low (around 0.1A) Computer is working if i force S0 state by...
  11. Sykulski

    [SOLVED]820-00840 burned wifi area and no backligt - need help identifying parts and ratings

    [SOLVED]820-00840 burned wifi area and no backligt - need help identifying parts and ratings Hi. This A1708 came in totally dead with liquid damage. The wifi chip had been on fire so I pulled it and cleaned the area. After that it starts but obviously wifi is not working at the moment. And it...
  12. Sykulski

    820-00138 Fans spins but no boot

    Was liquid damaged but cleaned by another repair shop so i can not see any corrosion. I asked the other shop if they could remember or had pictures of the damage but no luck. Symptoms: When AC connected fans starts to spin then stop then start and slowly goes faster and faster At the moment...
  13. Sykulski

    820-4924 No wifi detected

    I've got this one that isn't detecting wifi most of the time. Eventually on some boot-ups it is working. Something like 1 of 50 times it is discovering the wlan card and working. But after reboot and for the next many many reboots says "no wifi hardware installed" No liquid and no corrosion to...
  14. Sykulski

    820-00165 Dead

    This 820-00165 came in dead by a small amount of water Bad corrosion on U8005. Pulled and replaced U8005 with new one and wired pin1 to C8005/p1 as this trace was burned. Also replaced C8005. Now there is no fan spin, and all pins (PP5V_S0, PCH_HSIO_PWR_EN, PP1V05_S0, PP1V05_S0, SW_PCH_HSIO)...
  15. Sykulski

    820-3476 - Power but no chime and image

    Liquid damage that was cleaned by somebody else. When power on fan spins - then stops - then spins again and slowly ramps up and keep on spinning On first fan spin there is 3.2V on pin 5 (SPI_MOSI) and 6 (SPI_CLK) for 2-3 seconds but then drops and does not come back on along with the next fan...
  16. Sykulski

    [SOLVED] 820-3435 Green light only when battery is disconnected

    This is an Air 11" 820-3435 Came in dead with no light in charger. - When I disconnect the battery green/orange light comes up and all is working fine. (SMC_BC_ACOK = 3.11V) - When I connect a charged battery no light in charger but runs fine from battery. Not charging off course (SMC_BC_ACOK...
  17. Sykulski

    820-3787 No image after UC

    Got this MacBook Pro Retina 15 It had some minor liquid spill. Some sticky juice. Not very much mostly some sticky stains on top of cooler and RAM. Trackpad also little sticky. It was not charging the battery so I tried another battery and this charged fine. Then I thought I would clean...
  18. Sykulski

    [SOLVED]820-3476 - Liquid damage by a rotten fruit

    When I got this MBPr 13 in it could not charge. It had been lying vertically in a bag together with a rotten banana (or another fruit). Damage was heavily corrosion inside both thunderbolt ports. As there was no green/orange light and it could not charge I cleaned the banana off lightly with a...
  19. Sykulski

    820-3302 - PRAM reset causes 3 RAM beeps

    Hi. This is an iMac 21-inch (slim version). Came in with the 3 RAM beep issue. Replaced RAM still beeping three times. Checked DDR PWR 1.5V and 0.75V OK. Then i replaced the CPU. Now it starts but if I make PRAM reset the 3 beeps return. If I then take out power cord for a while and put it...
  20. Sykulski

    820-3588 - Noise in headphones

    This is an iMac 21-inch A1418 Sound is working fine through the internal speakers but when I plug in headphones there is just a constant noise in them. I replaced the headphone jack but issue remains. Any ideas where to go next?
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