Recent content by hambook

  1. hambook

    820-00928 Battery Charge Icon

    Hi all, I have a 00928 board on my bench. It came in with 5v 0.21a, PPBUS was 0.5v. Found that C6913 was getting molten hot so replaced it and now the machine gets to 20v and comes on, but it only gets to a "charge battery" screen for a few seconds and then shuts off. This happens with both...
  2. hambook

    820-00840 No Webcam

    Changing U3900 solved this one, thanks! Took a few times to get it to sit perfectly.
  3. hambook

    820-00840 No Webcam

    Did a double check on my initial measurements and I found that PP1V35_CAM is missing. I have CAMERA_PWR_EN. CAMERA_RESET_L is not low. What else do I need to get this rail to come on?
  4. hambook

    820-00840 No Webcam

    Hey all, having issues with a stubborn 00840 board. Came in for liquid damage and a new screen, repaired the liquid damage and the board is working great except for the webcam. In system report it doesn't show up at all, tested with a known good display assembly. ALS does work however. I checked...
  5. hambook

    A2179 Keyboard Issues

    Hi all, having an issue with a keyboard on an A2179. Had 2 come in for topcase replacement, one also needed a trackpad due to liquid damage and the other we re-used the existing trackpad. On the one with the re-used trackpad, everything went fine. On the one with the new trackpad, the keyboard...
  6. hambook

    01521 PPBUS Short

    Yeah, L9060 is around 4.2K ohms
  7. hambook

    01521 PPBUS Short

    Sorry, double checked and my PPBUS is actually 2.4 ohms. But the resistance between the mentioned coils and PPBUS is the sum of the two of them to ground, so onward. No coils on the board give 2.4ohm resistance. Would my next step be to inject a small amount of voltage into PPBUS?
  8. hambook

    01521 PPBUS Short

    I have an 820-01521 on the bench with a PPBUS_G3H short, 5v 0.01a on the charger. Getting 30 ohms on PPBUS, checked L7410, L7430, and L7210 and they aren't the exact same value but all are between 8-20 ohms, on a working board I'm getting 70 ohms. Does this mean the CPU is likely toast?
  9. hambook

    820-00165 Green Light No Fan

    Hi all, have a 00165 on the bench that's being stubborn. Has green/amber light but no fan spin, 20mA from the power supply. Originally had some corrosion around U8130 and J6100 and the DC board and flex were destroyed, replaced the board and flex and cleaned the corrosion, got green light back...
  10. hambook

    820-00840 No Power

    Yeah, same result with just the board on the desk no SSD or anything else. I'll do another pass around the liquid affected areas and see if anything looks out of place or damaged.
  11. hambook

    820-00840 No Power

    Hey all, have a 00840 on the bench right now that's not booting and has no caps lock/USB activity. Was liquid damaged around U3770, cleaned up with heat and flux. Has proper PPBUS, PP3V3_G3H, and ALL_SYS_PWRGD. PLT_RESET_L goes high, L7210 stays at 0.98V and doesn't budge. Checked R1320-25, all...
  12. hambook

    TPS62180 Alternative?

    L7410 seems to be as well, I'm getting 4ohms in resistance mode
  13. hambook

    TPS62180 Alternative?

    I'm also now getting a stable 3.3v at C6912
  14. hambook

    TPS62180 Alternative?

    With R6934/35 off, PPBUS is stable 12.29v. Will have to do some more investigating in the U6903 area.
  15. hambook

    TPS62180 Alternative?

    Getting 1.3ohms resistance/001 diode on PP1V8_SLPS2R. Does this signal originate from the T2 on this board?
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