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820-00165-A Chimes and external display but no internal display (screen not detected?)

D

dudipupan

Member
Hi everybody,

i received a MacBookAir from 2016 (820-00165-A) with a liquid da, U5800mage. I replaced components around U8300, many components around U6101 such as U3210, U7701 (Baclkight IC) and the LCD-Connector (there were some burnmarks on pins 2-4).
I also replaced the cable of the display.
So far so good - device is booting with chimes and i got external display (unforunately i lose signal after few minutes) but i don't get internal display.
I got the initial 3.3V on PP5VR3V3_SW_LCD in the first few seconds after booting but they don't stay.

So my question is: Where is my fault? Could it be a badly reballed Backlight IC? Or is it a bad LCD connector (I unsoldered one of a donor board and reused it)?
Is there any way to check why the screen is not detected?
It's not the screen - i already tested it with a kown working assembly.

Thank you and best regards
Dudidpupan
 
2informaticos

2informaticos

Administrator
Staff member
"I got the initial 3.3V on PP5VR3V3_SW_LCD in the first few seconds after booting"
DP_INT_HPD goes high at same time?

I hope you've checked voltage with LCD connected.
 
D

dudipupan

Member
R8350 is good. I think I messed up the LCD connector when unsoldering it from the old board. Tried it with a loose lcd cable and diode mode on the multimeter bit didnt get any connection. So I will wait for my new LCD connectors and change it again :)
 
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