[SOLVED]820-3115 with couple of keys not working

Have a headache-inducing 820-3115 that had no liquid damage, but the keyboard wasn't working properly (keys 7,8,9,u,i,o,j,k,l,m, comma, period, left and right arrow) not working. sometimes, when i press the m-key, the trackpad registers a click (whatever the cursor is pointing at, gets clicked upon key-press)

Of course i suspected the customer probably díd spill something, so tried a known-good keyboard, but no dice.
Have ofcourse tried several other new keyboards (4 in total), but the symptoms are the same.

I have tried two different J5713s and have tried swapping the U5701 with another one (only once, so might try again).

Was wondering if anyone knows which WS_KBD lines i should suspect, since it seems pretty obvious to me that one set of them should be the culprit.
I cannot find any documentation on which lines represent which keys.

anybody have some pointers?
 
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below diodemode readings on U5701 (compared to another 3115 that just came in with working keyboard, and no differences

.
pin of U5701voltage drop to ground
1.510
2.865
3.860
4.859
5.858
6.861
7.861
8.869
9.861
10.863
11.860
12.861
13.859
14.861
15.861
16.863
17.860
18.866
19.0
20.845
21.853
22.408
23.873
24.875
25.863
26.863
27.862
28.863
29.881
30.880
31.879
32.878
33.875
34.876
35.874
36.875
37.872
38.874
39.871
40.873
41.872
42.871
43.864
44.870
45.865
46.869
47.865
48.871
49.409
50.0
51.686
52.817
53.674
54.862
55.507
56.505
 
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Jesus on a stick holy mother of god...
I am actually too embarassed to share this, but for the sake of helping clueless souls like myself i will share my being abso-fucking-lutely trolled by this Mac:

There is a software-'feature' called 'mouse keys'...
It was ticked under System-preferences.
This can be triggered (if enabled) by pressing the Alt-key 5 times in a row.

My fucking god. I swear, I'm going to throw myself against the wall for measuring and soldering on this fucking board.


I am so humbled.. hope someone with similar issues will find this thread before prodding around as much as i have.
 
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