this one has been wd for few years back. it was apparantly cleaned with IPA. I inspected board everything looks good except C7900/7901 both had ends missing. The two ppbus_g3h probe points were absolutely eaten away. when i poked them they just crumbled away.
One of the sells is also swallon next to trackpad - I tried new cable for trackpad but no change.
One of the sells is also swallon next to trackpad - I tried new cable for trackpad but no change.