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  1. J

    A2115 27" 5K iMac not turning on after SSD upgrade.

    Hello again. I just cloned a customer's iMac internal hard disk onto a 2.5" SSD connected via a USBC adapter. That completed successfully. I then removed the AC power, removed the two connectors for the screen, took out the screen, and then replaced the hard disk. Prior to reassembling it, I...
  2. J

    A2141 stuck in recovery mode.

    Hello. I have a customers Macbook Pro A2141 that appears dead, no fans or display but trackpad does click. Customer reported that it worked fine last use, and that it hasn't been dropped. I removed the back cover, and, apart from dust, no other sign of any liquid ingress or other issues. It...
  3. J

    Macbook Pro A1989 820-00850-A not turning on.

    Hi all. We replaced a display assembly with an aftermarket screen. The customer bought it back a few weeks later stating that the hinges are too tight. I checked the system booted, and confirmed the faulty hinges, then shut it down, and removed the assembly and replaced with another aftermarket...
  4. J

    A2251 (820-01949-A) No display on internal or external monitor

    Hello again. Working on a 2020 Macbook Pro. Model A2251 Board model: 820-01949-A It has no display on the internal screen or on an external screen. I tried with another new screen as well. Customer originally reported when they bought it in that it was slow to start up, and was shutting down...
  5. J

    Does the store sell flux? If not, what brand/source do people recommend?

    As per the title, does the store sell flux? A search on the store for flux returns 5 items, solder braid, etc, but no actual flux? Is it hidden away somewhere? If the store doesn't stock it, can anyone recommend a decent Brand, and good source for them? I'm in Tasmania, Australia, but happy to...
  6. J

    820-01958 not turning on. Only 5.25v on both USBC ports. PP1V1_S3 only 2.3Ω

    Hi all. Looking at a 820-01958 board that was extensively water damaged. After cleaning, I'm only getting 5v on both USBC ports. With the AC adaptor connected to the primary (REAR) USBC port: PP20V_USBC_T_VBUS 0.00v PP20V_USBC_X_VBUS 5.25v However, With the AC adaptor connected to the...
  7. J

    820-01521

    Hi all. I have an 820-01521 board with no signs of life. No obvious signs of any water, or other, damage. No sign of heat. Only has 5v on either USBC port. Tried with another USBC port cable, and another known good genuine AC adapter. F7000 0.02v PPBUS_G3H 0.56v R7020 5.12v on pins 1 - 4...
  8. J

    liquid damaged 820-00165-A with no fan, amber light OK, ALL_SYS_PWRGD = 1.2V

    Hi all. Liquid damaged 820-00165-A Minor corrosion on top side of board around U6100 - U1900 & U7701. On the bottom, only a tiny bit near Q7155 Cleaned affected areas. Get green then amber LED on magsafe2 adapter. Tested with spare known good adapter No fan spin. I've tried to manually start...
  9. J

    820-01598 not detecting or running on battery after liquid ingress.

    Hi all. I'm working on a 820-01598 that had water damage. It originally came in not turning on. The only signs of corrosion was on the bottom side of the board. There was a small amount of corrosion on the battery PCB, On the logic board, there was a small amount of corrosion near F7000. I'll...
  10. J

    (Resolved) 820-00281-A only 5V, no 20V. Missing PPBUS_G3H

    Hi all. I have an A1707 2016 macbook that is not turning on, either via battery or via genuine known good AC adapter. No signs of liquid damage. Missing PPBUS_G3H. Suspecting U7000, but thought I'd get advice first. Here's a list of what we've checked. PPDCIN_G3H = 5.27v PPBUS_G3H = 0.23v...
  11. J

    iPod Touch 4 data recovery. Not booting. White screen loop during attempted flash

    Hi all. I'm trying to recover some photos from a customer's iPod touch 4. When it was bought in, it was in a Apple logo - white screen - reboot loop. I can get it into recovery mode, and I have tried to flash it from there using 3uTools, however the flash fails with "Error: Unable to restore...
  12. J

    820-00850-A no display on internal or external screen

    Hi again. I get 20 volts to F3001 when connected to the outer USBC port on J3300. The trackpad clicks, so the unit is turning on, but there is no display. The power button will turn the unit on and off - i.e. the clicking will stop, or start, again. There is no signs of any liquid ingress to...
  13. J

    820-00239 missing PPBUS_G3H

    Hi all. I have a dead 820-00269 from an A1706. Missing PPBUS_G3H. I get 20v on F3001, however no voltage on F8400. I removed F8400, and injected 1 volts into pin 1 and found U7960 getting very hot. I removed that and there still appears to a direct short (zero ohms) to ground on the pads of...
  14. J

    820-00239 dead. Missing 20v.

    Hello again. I have a 820-00239 that appears dead - no life, no fans. No USB activity at all. No signs of any liquid anywhere on either size of the board. Tried with known good AC adaptor with just the bare board. I don't seem to get 20v anywhere - the most I get is 5.7 volts. I'm also...
  15. J

    820-3437 short on PPVRTC_G3H even with U1900, C1910,C0890,C0891 & C0292 removed - Dead CPU?

    Hi again all. Short circuit to ground on PPVRTC_G3H. I suspect the CPU is dead, but thought I'd check before writing it off. 820-3437 Magsafe light OK, no fan, no chime or anything else. No signs of liquid ingress or other damage. I've removed all caps on PPVRTC_G3H, short to ground (0.08Ω)...
  16. J

    820-00928-A not detecting integrated SSD after liquid ingress.

    Hi again. I have an 820-00928-A that does not detect the internal SSD. This unit was apparently water damaged. Another technician cleaned the board, unfortunately, so I cannot see where the liquid got onto the board. There are no signs of corrosion anywhere. Booting from a Monterey boot disk...
  17. J

    820-00165-A Not display on int or ext screen. Orange light and fan spins,

    Hi all. I have a water damaged 820-00165-A that has no display, either on the internal panel, or on an external screen. There is zero change on the screen when power is connected. I cannot see an Apple logo or folder question mark while shining a light from the back. I have tried another...
  18. J

    820-02020-A no backlight until after login, and non functional touchbar

    Hi all. An interesting one. We have an A2338, running Monteray, that has no back light from the moment you turn it on, until you have logged in with your password, when it will turn on, and stay on. i.e. the Apple logo doesn't have a back light at all, or the login screen. We have tried two...
  19. J

    820-00239 No video on panel or external monitor

    Hi all. First, I'm not familiar with working on this model board. No video on internal panel or externally on any USB C port with a USB-HDMI adaptor that I've had working in other Macbooks. No fans, no chime. No signs of any liquid damage on either side of board. Power rails seem good, CPU...
  20. J

    Dead 820-00165-A. Orange light, no fan after U1900 replacement.

    Hi all. I have a dead 820-00165-A logic board, only an green then orange light, with everything including the battery disconnected. When it arrived, with those symptoms, I found U1900 was getting to hot to touch. Checking power to U1900, PP3V42_G3H was correct at 3.40 volts However, PP3V3_S5...
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