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  1. Ictc

    Macbook Pro A1398(820-3787-A) Backlight problem

    Got this laptop with little liquid damage spot around ISL that only prevented power up without battery connected and a shorted cap on the flash drive that prevented the drive to be recognized at boot. Fixing those problems, the machine powers up and boot but still without backlight. I of course...
  2. Ictc

    iMac 21" 2017 - 820-01237 - Missing Common Mode Chip Inductors and LAN Trasformer

    I got this board from a client wich attempted a self upgrade of the NVme unit messing up some smt passive components o the board. The missing component are one LAN trasformer and its relative common mode choke. I've been able to find the type of product and may be the OEM (Murata) but they have...
  3. Ictc

    820-01521-A

    Got this machine that doesn't boot up but charges the battery. Non liquid spills at all, the board look very good. I get 20v on both usb C adapter voltmeter and most of the power rails seems to be solid except for the cpu s0 related power rails... CPU heatsink gets little bit warm but pressing...
  4. Ictc

    820-2523-B charges battery, sometimes does not power-on with original adapter.

    Got this old machine with battery status indicator shorted and unable to boot. Fixed the battery charge indicator that solved the issue. Left off charge for 1 day performed a PRAM reset than stopped power on again with battery connected. Took out the logic board didn't start as well so I try the...
  5. Ictc

    820-3115 Fan spins for one second than stops cycle

    I have this board apparently no short, also checked main voltages and current sensing circuit around u7200 for wrong resistor values. Didn't find the cause of the problem so far.
  6. Ictc

    820-2850A No Bluetooth

    I have this old machine that runs perfectly except for the BT wich is not showed in the os. I tried different OS before taking the mobo out. I swapped the BT/WiFi module with another one and still the same. Wifi works, USB works as well but no BT. I cheched the path from J3401 to U3700 and it's...
  7. Ictc

    I'm not able to perform any search in the forum.

    Anybody can help me in finding out the search feature I'm missing? Seems to be gone!
  8. Ictc

    iMac 21,5 late 2013 - 820-3482 ambient sensor - LCD Poximity - Discs Temp issue

    820-3482 A I got this machine after a client DIY disk swap attempt. The screen was damaged as well the lvds flat wich I allready replaced. Now the machine presents an issue that prevent the system to run quiet... Fan spins at full speed probably due to the sensors misrepresented temperature...
  9. Ictc

    820-3115B running slow ASD error NDC001 but camera seems to be ok

    I got this previous liquid damaged machine back after 6 months of normal usage. The machine runs slow at boot and after logon as an effect of a sensor failure perhaps. The camera seems to work, the only strange thing I noticed in the beginning were some spikes on video using photo boot. I also...
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