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820-00163 15 inch restarts when trackpad is connected

W

wgaca

Member
As the title says, tested in fully working known good top case including the trackpad.
If the trackpad is connected it starts to boot, shows apple logo and just before it has to show the login screen it restarts.
It is the same with internal SSD, external OS and known good SSD.

Side note, the trackpad does function just fine in the option menu.

I replaced U4820 in desperation to see if it's going to change anything but the issue still persists
If I disconnect the trackpad it boots to OS just fine.

Any ideas what this can be?
 
2informaticos

2informaticos

Administrator
Staff member
Test with known good battery.
Does it stay long time on, if you leave it in boot menu?
Only restarts when progress bar appears?
Try SMC bypass and safe mode too.
 
W

wgaca

Member
I tried a brand new battery, this time it works.
I have no clue why it didn't work when I tried the other top case with the battery..

Anyway, thanks for the help.
 
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