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MCU problem diagnostic

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Hi mates.
I'm new at this world, if experts can help I will appreciate it !!
I have bought recently a model S salvage tesla 2015/06.

I replaced the onboard charger and driver seat module that was not working.

Now I'm trying to find MCU problem.
It doesn't turn on, I test it on bench, it starts fans and stop immediately. But the lights still on.

There are 4 check LEDs that don't turn on (uploaded image)

Does someone knows the problem?
Do I need a new MCU?

I also will need someone who can program all the replaced parts. And ofcourse I will pay for it.

Thanks mates !
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