Agilent 34970a missing input cards/water damage

[Laszlo]

Hi.
I found an agilent 34970A floating in a garbage skip. Suffice to say, the water didn't do any good to the transformer and there is also minor corrosion marks on both PCB boards. After spending two days cleaning and drying the unit it now almost look presentable, but the frame is still rusty in places and I can't seem to get rid of the corrosion around the relay pins on the internal DMM board.
Does anyone know a magic trick to remove the rust of the frame, and also to clean the PCB of the residual corrosion?


The unit now powers up without any issues but it displays an error due to the missing input boards/cards at the back. These were already missing from the unit, or sinked at the bottom of the skip and I couldn't find them.
Quick search on the interweb reveals that the cards can be sourced, but these are rather pricey so I was wondering if there is a way to hack/bodge something at the back of the unit which would make it possible to try at least some basic measurements with the internal DMM.
If someone have experience with this unit, or have a working input module and lives around East Midlands Uk please leave a message.

Thanks a lot.
Laszlo

[Ordinaryman1971]

Not sure if the errors would be caused by the input cards being missing, what's the code no?
That's a nice find but I guess it didn't end up in the dumpster for no reason, I guess it failed somehow.
How is the display, working fine? Even if you end up with parts, they are worth some money.
And if you have DMM board inside... you're lucky, a lot of those machines came without this "option" and they are impossible to find.