820-3437 missing backlight

MDY

New member
820-3437 missing backlight
Liquid damage arround lvds. I replaced LVDS connector and now I have 39.6V at lvds pin 3,4. I can see blinking folder using lantern.
39.6V is enought? This mean U7701 (LP8550) is working well?
 

MDY

New member
LCD cable looks pretty good. Can I connect another screen to test? I dont have macbook air screen for 2013-2014 year. I have Air 2012 and MBP 2012.
 

dukefawks

Administrator
2012 Air assembly should work. Read my question again and check that too. LCD must be plugged when measuring anything.
 

dukefawks

Administrator
Then there is no continuity between the backlight pins and the LCD. 39.6V is way too high and indicates that there is no load on the rails. Could be badly soldered connector or a bad LCD/LCD cable.
 
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