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it is working. All sensor test are there and internal and external tests
in the beginning was no backlight but keyboard everything working, after starting ASD the machine switchrd to the extern GPU and backlight was coming.
asd shows gmux switching error, I heated with 100 the GMUX a little and the error was history after that is backlight after restart from the beginning.
So I still replaced the GMUX with a good one (the old was blown up a little on the side)
So now everything is working fine.
Duke can you give the secret what did you do with the bios?