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  1. overshoot

    A1989 - Boot loop (820-00850)

    Hello, I have that board where the data is important that is boot looping and I haven't tried DFU revive/restore yet. Screen comes on, no Apple logo, and will turn off after around 10 seconds and does that in a loop. When the board turns off, the SSD_PMU_RESET_L goes low. PPBUS is stable at...
  2. overshoot

    A2338 M2 820-02773 5v 0.10ma

    Hello, I've got this board that stopped working after, that's what the customer has reported, the trackpad stopped clicking. Board looks pristine, no liquid damage that I can spot. I was getting 20V 0.01A with battery plugged in. Without battery, I am now getting 5V with 0.1A current drawn...
  3. overshoot

    820-02098 - PP3V8_AON sits at 1.5V

    Hello, I have that 14" M1 board that was previously liquid damaged and repaired. As I've received it, PP3V8_AON is at 1.5V fluctuating up to 1.7V and PPBUS_AON is at 12.25V. I am getting a .16V drop to ground on the PP3V8_AON line and when injecting voltage, the amperage drawn is minimal...
  4. overshoot

    820-02016 - No image/backlight

    Hello, This is a board issue. I've tested with board another good working screen, same symptoms. Client's screen works with test MB. Works with external display as a secondary monitor. Here are some measurements: edp_panel_1v8_en = 1.8V pp3v3_sw_lcd = 3.3V pp5v_sw_lcd = 5V bl_pwr_en = 0V...
  5. overshoot

    820-01949 - Only 1 USB-C port goes to 20V. Board won't boot

    Hello, I've got that 820-01949 that has liquid damage on both side of the board, close to the air intake. Customer live on an island and the humidity is always a concern here, in conjonction with dust. Damages on one side are: - R3208 - R3209 - C3102 - C3512 Damages on the other side are...
  6. overshoot

    MacBook A2681 - Pink screen then reboots

    Hi, I have that MacBook Air M2 that will randomly restarts giving a pink screen at first. The crash log reports the following message: SOCD report detected: (iBoot panic). That's it. When running the diagnostic tool, it gives the error about the camera NDC001 When booted up, the camera will...
  7. overshoot

    MacBook A2141 - Not charging

    Hi, I have that board 820-01700 that is not charging. Laptop is turning on with charger plugged in. It will also work on battery but will not charge the battery. I am getting 20V with 0A drawn when battery is plugged in on all 4 ports. However I got it to charge for a few seconds and then it...
  8. overshoot

    iMac 27" 2019 - Apple board replacement

    Hello, I have ordered a replacement board on ebay for an iMac 27" 2019 and got apparently an Apple replacement board with no SN. I went to flash the original serial using the blank board serializer and all that worked fine. However once I started updating the OS I was prompted by a firmware...
  9. overshoot

    MacBook Air 13" M2 (A2681) - No keyboard

    I have that machine which looks clean. Trackpad works but keyboard doesn't. I've inspected the internals and trackpad as well as cables connectors look fine. A few spots on the cable where tiny stones or debris have left marks so thinking it's worth trying swapping that cable first but I don't...
  10. overshoot

    820-02016 with USB-C cycling at 5V, but sometimes settles at 20V and starts to boot

    I have that machine that came in, dead, with the trackpad clicking. Customer mentioned that the machine switched off while being used. Upon visual inspection, nothing appeared out of ordinary. Plugged the board alone to USB-C and both ports would cycle at 5V, from 0.14A to 0.3A then charger...
  11. overshoot

    820-01521 USB-C ports cycling

    Hi, I have that board that was previously worked on. Customer told me the laptop did shut off while working, battery was charged or at least partially charged. When I got the board, the amp meter was showing nothing. Upon inspection the USB-C area was reworked as well as the as the U7000 area...
  12. overshoot

    M1 Air 820-02016 - no backlight

    Hello, I have this board which my personal board used for test and I screw it up while testing a display not fully assembled in the case. I saw a spark near the CD3217 if I recall well and that was it. Now I can tell I have the 5V and 3.3V lines to power the screen and also, when the screen is...
  13. overshoot

    iMac 27" 2019 - Restart in loop

    Hi, I have a customer that came in with an iMac that is restarting in a loop. The iMac was previously repaired by another shop and I can see the Bios has been reworked somehow. The customer has reported that the loop happened after he tried to install an SSD in place of the HDD. Since then the...
  14. overshoot

    820-00281 - Not charging, shows sign of battery flat

    820-00281 Not charging, 5V 0.02A on charger only (battery unplugged), 20V 0A with battery plugged, shows sign of battery flat. Should be a simple problem to fix but... Each USB-C port shows 5V with 0.02-3A consumption. No port power cycles. When checking rails around the USB-C chip, I'm getting...
  15. overshoot

    820-01700 - Stuck at 5V

    Hi, I have that 16" 2019 board which won't turn on. It's stuck at 5V 0.3A on any of the 4 ports. I am the 2nd tech working on that board. Visual signs: board is clean, no liquid damage that I can see. CD3217 have been reworked (reflowed or replaced) by the previous tech. With battery...
  16. overshoot

    820-01700 - Charging issue after repair

    Hi, I've got that MacBook Pro 16" that came dead. Wouldn't wake up from sleep. After first inspection, board would not start, was getting 20V but stuck at .04A floating. Tried reviving/restoring but got Error 6. After further inspection, I did find some signs of liquid on one edge of the...
  17. overshoot

    820-01041 - Randomly starting

    Hi, I have an 820-01041 that is really playing with my nerves. It was liquid damaged on the edge where the air intakes are. Initially I was getting 5V only. The 1.1V LDO line was not coming on. It had a shorted capacitor on the SSD rail. Replaced it and a few others that looked nasty and got it...
  18. overshoot

    820-00850 - No S5 voltages

    Hi, I got that board for data recovery. Customer went to Apple after he cracked his screen. MacBook was working prior to going to Apple as he said he could use it on an external screen + internal screen was lighting up. Apple did diagnose that both screen and mainboard were dead. Anyhow, Apple...
  19. overshoot

    820-01700 - 20V and goes up to 1A, then back 0

    Hi, I have a 16" MacBook Pro that negotiate 20V and amperage rises up to 1A then back to 0A and does that in a loop. I have tried that motherboard in a different enclosure, known good, and it does exactly the same thing. So I believe it's confirmed to be a board issue. Board is corrosion free...
  20. overshoot

    820-00840 - Missing PPVCCGT_S0 - No display on internal nor external

    Hello, I have that board that had a prior repair attempt. I don't have any history from the customer on it. The only thing that I saw was the board have been reflowed in the USB-C area. There was also 2 missing diodes of the keyboard I2C lines but I have put these back already. Other than that...
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