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Leds on main PCB in the MCU

Discussion in 'Model S' started by Dr_F, Mar 15, 2019.

  1. Dr_F

    Dr_F Member

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    Leds.jpg Should all these leds be on normally? Does this indikate trouble with the power supply circuits? The car is a 2014 model S
     
  2. appleguru

    appleguru Member

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    That looks pretty normal for a fully functioning/booting board to me (except for the LED off for the 12V OLCD light... do you have a screen plugged in?)
     
  3. Dr_F

    Dr_F Member

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    The MCU is on my workbench with 12V from a power supply. Screen is still connected but black. It takes about 0.8 A.
    When I put back in the car, I can drive the car but the MCU seems braindead. Scroll wheel reset makes the leds go out and come back again after a few seconds.
     
  4. appleguru

    appleguru Member

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    Here’s what mine looks like for a comparison:
    1663189A-350C-49E8-8010-4085B94AF19B.jpeg

    If you can connect to the screen via Ethernet you can troubleshoot more... most common cause of “black screen” is corrupt emmc. If cid-updater is still loading (and/or you can get to recovery mode), you may be able to install updated fw and get up and running again.

    If you want to test more on the board, meter the 3.3V, 5V, And 12V rails at one of their labeled test points and make sure you have good stable voltage for all.
     
    • Like x 1
  5. Dr_F

    Dr_F Member

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    Tried Ethernet. The yellow led lit up and the green flashed quickly. (arrow in pic.) I tried to ping 192.168.90.100. No reaktion.
    I tried both ethernet connections with the same result.

    The 5V0LCD and the 12V0LCD are on on your board. Are they turned on in a later stage in the boot sequence?

    The problems started when I was listening to Aerosmith on spotify! Occationally the MCU didnt start up. Then, after from a couple of minutes to an hour, it could start without warning. It was like this a couple of months til I tried "return to factory settings". After that it has shown no signs of life at all. SO DON'T LISTEN TO AEROSMITH.

    Leds2.jpg
     
    • Funny x 1
  6. appleguru

    appleguru Member

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    Which ethernet port are you connected to? Unless you unlock it, the diagnostic port will be locked down/you won't be able to ping. But you should be able to ping from the IC port. try pinging 192.168.90.102 (the gw) and 192.168.90.100 (cid).
     
  7. Dr_F

    Dr_F Member

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    IC-port.
    gw (...102) responds to pinging.:) No respond from cid (...100). :(
     

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