the one with the 140 and 150 together? yeah, I got that one. that 150 was in poor condition and has the same problem as yours... I think both of them were garbage finds, very beat up. but the guy was honest, really did not know what he had. 140 worked(screen has some damage) the HDD is now in my 180 and the 150 had RAM upgrade with the DUO memory adaptor.
It does boot when I give it power to the battery terminals, but the screen is blank(backlight on). inside rear of the case is green with corrosion looks like the logic board got wet maybe... all the boards above the logic board look perfect so it might have been sitting back end down in a puddle? (ports all show a little green, and the power port is dark with corrosion) and it has a light aroma of fried electronics