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

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 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.

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

I meant the cables to the MCU. But I've figured it out myself. Thanks anyway.

Is it necessary to disconnect and connect the cables in a certain order? Which one is the power supply?