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  1. Hermann Neupert

    820-00165 cpu and proximity memory sensor at 129°

    Hi, I receive a water damage board. After cleaning the board and changing the trackpad flex. Fan spins at full speed. I install hwmonitor and CPU 1, CPU 2 and memory proximity shows 129°. U5800 area looks fine, no water near it. Traces to Q5810 and Q5860 have continuity. With webcam unplug...
  2. Hermann Neupert

    820-3437 only SSD T°, fan at full speed

    Hi, today I receive this machine, fan speed is high always, it takes 3 or 4 bottom press to power up, it doesn't power up just connecting charger. I install hwsensors and only shows SSD T°, also battery info is not available. Battery don't charge, and when battery is plug, charger light turn...
  3. Hermann Neupert

    820-0923 don't charge or boot

    Hi, Board is water damage, most corrosion was in the little caps around the XA/XB USB port connector. Also C3101 was looking nasty, I replace the caps, no shorts detected, just ugly caps. When I plug the original charger with an amp meter I get steady 5.11V in XA port. XB port pulses 5 seconds...
  4. Hermann Neupert

    820-3023 charge sometimes

    Hi, Board is not water damage, inspecting board under microscope didn't find anything unusual. Board only recognize charger sometimes, I´m trying 2 different 60W original chargers and a power supply with a original cable. I have to connect between 10 to 20 times the magsafe to get recognize...
  5. Hermann Neupert

    820-2936 video problems

    Hi, macbook came with video problems, when power up it shows the apple logo, when booting progress bar is about halfway, video start looking funny, like image is double, then the cursor arrow shows up and background image goes and come, but arrow or loading cursor the multicolor circle shows...
  6. Hermann Neupert

    820-00165, fan spin but no video.

    Hi, Board came with a little speck of water damage, only caps C5002, C5010 and C5017, near SMC, where damage and nasty, charger didn't have light and no fan spin. I change the 3 caps and now board have light in charger, and fan spin, but no image in screen or external monitor. CPU gets hot, but...
  7. Hermann Neupert

    820-00165 shows battery icon and shuts down

    Hi, board enter with no power problem, problem was SMC, so I order some donor boards, and change the SMC. Now board turns on, fan spins, after a few seconds shows the battery icon, with the lightning below the battery and then shuts down. In the power supply it shows consuming 0.45A at 19V...
  8. Hermann Neupert

    820-00165 No power on pm_slp_s5_l, no pulse

    Hi, board came with some minor water damage, mostly in U7090 and U5110 areas, caps and resistors look fine, no shorts. Since I didn´t find anytingh unusual I put the board in the ultrasonic cleaner. Board don´t turn on, no fan, only light in the charger. SMC_ONOFF_L = 3.38V P3V3_S5 =3.32V...
  9. Hermann Neupert

    820-00138 1 second apple logo

    Today I receive a Macbook A1398, board is 820-00138. Problem start with a water spill over the keyboard. Customer clean the board before bringing to us. Macbook turns on, you get the apple sound a few seconds later apple logo shows for a second and Macbook turns off and starts to bootloop...
  10. Hermann Neupert

    820-00045 usb-c problem

    I receive a board A1523 2015, at first it only charges, no usb-c devices where recognized, try different adapters and usb-c to usb-c cables, and nothing. But it charges. Then I order some U4520 IC, and change U4520. Now I can have video with a USB-C to HDMI adapter, also USB 3.0 pendrives and...
  11. Hermann Neupert

    820-2936 no backlight

    Board is water damage, on inicial inspection I detect that R0910 is bad, I also replace the BL driver U9701, tons of crap under the IC. Now I have 12.5V in PPVOUT_SW_LCDBKLT all the way to pins 21 and 22 of J9000. Have measure all resistence around the driver and all readings are fine. Line...
  12. Hermann Neupert

    820-2849, fan spins for 2 seconds in a loop

    Macbook 17", customer says computer was heating up and randomly shutting down. He went to an Apple partner store, apparently only give a format to the computer and return it to the customer, he is not sure if something else was done to the macbook. As usual they try to sell him a new machine...
  13. Hermann Neupert

    820-2879 No PPBUS_G3H

    Board is water damage, at first no green light no nothing. U6990 was damage, R6905, C6990, and small resistor in the area with some degree of damage or oxidation, change all. Now I have pp3v42_g3h and green light. Q7080 working fine. Q7085 don't let pass PPDCIN_G3H I have 17.56V in pin 1, 2 and...
  14. Hermann Neupert

    820-4924 It takes 25 seconds to chime and turns off at 40 econds

    At first problem looks like a no turning on, becasu it takes for ever to chime, and fan don?t spin immediately. It actually chime after 25 seconds, always. After that you get the apple logo and then the password screen, but only for a few seconds, because it turns off. Actually PPVcore and S0...
  15. Hermann Neupert

    820-3115 No RAM, 3 Beeps

    Hi, need help with a Macbook Pro 13", 2012, motherboard 820-3115. Board boots and don't detect RAM, have try different known good RAM and nothing. Board don't have liquid damage, the problem just appears one day, not gradually, no freeze screen or ramdom rebooting before. PP1V5_S3_DDR is 1.5...
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