820-3787 wont boot with trackpad

[ajdoc]

Liquid damaged.
Wont boot with connected trackpad.
Got logic screen for a second and then blank screen.

When trackpad is disconnected works fine - of course fan on max because of no temperature reading from 'Palm Rest' sensor.

Got two new trackpad with new cables and always got same issue.

When is booted without trackpad and then I connected trackpad fan will works on low rpm and all temperatures are reading OK.

Any idea?

 

[2informaticos]

When starts with trackpad connected, machine goes off, or only blank screen?
It still has USB activity?

 

[ajdoc]

After login screen, blank screen with backlight, USB works. After a few seconds shut down without restart..

 

[ajdoc]

Anyone? Any ideas?