PowerBook 180 completely shorted

[fluxtransistor]

So I just picked up a new 180 which had quite a bit of battery corrosion inside of it. However, after thorough cleaning, I’m still getting a short circuit on the main DC input jack (with everything unplugged from the motherboard). + to - reads 3 ohms. I’m conparing this to a dead 170 board I have around which reads several hundred K. If there’s a shorted line somewhere, I can’t find it! Please help.

 

[fluxtransistor]

Update: photos. I may have been too dramatic about the corrosion, looking at some other posts here it seems minor.

 

[fluxtransistor]

Curiously, the resistance across three adjacent components - C51, D15, C69 by the power jack on the underside of the board - is the same 2.5 ohms I’m getting across the jack. Does anyone have a 180 board to compare this to?

 

[fluxtransistor]

My intuition led me to desolder the D15 diode, which turned out to be blown. I’ve replaced it with a similar looking one from the PB170 board (which died after I fried a MOSFET). Updates when I reassemble the machine, but the board is looking good with a healthy resistance in the megaohm range.