820-01958 no keyboard light

Levitor

New member
i Will connect original broken lcd and connect to external monitor and test.
O don’t have other working board to test
 

Levitor

New member
I put the old LCD on and to my surprise the keyboard light came on. the broken lcd belongs to core i5 2020 not M1 the good lcd is 2018
 

2informaticos

Administrator
Staff member
You get KB backlight with original display, so there is ALS issue for sure.
Maybe compatibility issue, find the exact year screen assembly.
 

Levitor

New member
I was comparing j8500 of both schematics(820-01958-820-01521) where I tested the LCDs,J8500 same all points even ALS same .
 

2informaticos

Administrator
Staff member
Don't waste time checking on the board; you can generate other damage instead.
Nothing wrong there, if you get KB backlight with original screen assembly.
 

piernov

Moderator
Staff member
2018 doesn't have True Tone, 2019 and 2020 have True Tone. It seems they are not interchangeable. Extremely hard to buy good LCD assemblies for these machines. Mostly garbage on the market. Get it replaced at Apple.
 
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