First time poster here. Since OP hasn't replied I thought I would share my success story in case anyone else comes across this same problem.
My AEG F78002VI0P dishwasher completely died half way through a cycle last week. I researched around a few other places before finding this post.
Was quoted $600 for a new controller board and display/button panel which I wasn't happy about paying.
I ordered a few
47Ω 3W Resistors and
LNK364GN IC's and swapped out the dead components. Like OP, R70 resistor was corroded and the controller IC had a black spot onto it.
After soldering on the new components on I only plugged the mains cable, display panel and power switch back into the controller and turned it on.
The display came to life and started beeping, so I turned it off and plugged everything else back in one by one.
I then let the dishwasher go through a full cycle before putting everything back together.
I didn't get fusible resistors like Kleinstein pointed out, was too late as I already ordered the components. Maybe I will order some and swap out the metal oxide one when it arrives.
Anyhow, 47Ω 3W seems to be the correct value. I noticed one half of the resistor band was white, while some other parts was dark brown-ish. So perhaps heat from the resistor made the pigmentation of purple turn white after time.
Other places seem to confirm its 47Ω 3W too. Anyways, thanks. All good now.