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No 3v on adapter sense, tried a known good magsafe

So I have PP3V42_G3H on the one wire circuit coming through pin 1 of C6908 and other areas. How do I know if i have a bad U6901 vs a bad via?

Yes it does, happens all the time when the battery expands in the case.

Awesome, thank you i will and get back to you.

I can not believe i completely missed the no stuff on the schematic. Lcd connector looks great, no corrosion. plugged in a known good screen and it came on. What could keep the old screen from working if the cable isn't damaged? Still can not figure out why it will not boot off of the charger alone

Ok, I just joined and have to admit i am a little intimidated! I am a rookie. I get green and orange light on charger, boots, chimes, no back light at all. Computer will not power on by charger alone it must have battery to power on. Inspected back light circuit to discover R9703 missing...

Ok, I just joined and have to admit i am a little intimidated! I am a rookie. I also have an 820-2530 board so thats why i am jumping on this thread instead of a new one. I get green and orange light on charger, boots, chimes, no back light at all. Computer will not power on by charger alone it...