Dell Precision 7510 Coffee Damage. Daughterboard dead.

[Andreasbest]

Hello!
Today i received a 7510 with coffee damage.
Keyboard is dead and replaced but i indicate a problem on left daughterboard.
It's completely dead.
Tried with 2 more boards that i have from a donor 7510 but no luck, no response at all.
Neither USB or HDMI.
Any thoughts?

Schematics and boardview attach.

[Sephir0th]

Re: Dell Precision 7510 Coffee Damage. Daughterboard dead.

Basic Thing would be to check the ribbon cable for continuity.

Pictures of the liquid damaged area?

[Andreasbest]

Re: Dell Precision 7510 Coffee Damage. Daughterboard dead.

Unfortunately is not ribbon, it's connector and there is no space to measure.

[Sephir0th]

Re: Dell Precision 7510 Coffee Damage. Daughterboard dead.

But you can check for loose pins, no? At least it doesn't Looks nice and clean.

btw, What's that?

[Andreasbest]

Re: Dell Precision 7510 Coffee Damage. Daughterboard dead.

It's the CN71 cap with black solder on one pin, from the coffee damage i guess.
It's on the HDD circuit, i don't think it has anything to do with the daughterboard.