So the switch matrix on my TZ has column 8 not working. The board looks great and does not have any visible battery damage, however, it did have a leaky battery when I acquired it 13 years ago. From reading prior threads I managed to diagnose it to the point that I have determined that I do not have continuity between U20 pin 11 and connector pin J206-9. So in between U20 and the connector we have a capacitor (C18) a resistor (R74) and the board trace. Where do I go from here? How can I determine which of these components is bad?

The capacitor is a 470pf and the resistor is a 1k ohm. Assuming these could be bad where would I find the correct ones to order? Anyone have a link to the exact parts? I am not super knowledgeable with respect to board repair but I have replaced a few blown transistors. When I search on the capacitors I find that they can have different power ratings 1W vs 2W. Which one would work?

I used zaza diagram and previous posts to get this far. Any help would be greatly appreciated. Thanks.

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Ok thx but now that I know where to buy the items how do I determine if the resistor or capacitor are bad?

Woohoo! Success! Thanks for all your help everyone. With your help I managed to figure out that the trace was broken between the C18 capacitor and the J206-9 pin. I soldered in a jumper wire and bingo - everything on column 8 works now. Thanks again.

As requested, here is a picture of the MPU. I should have taken a picture of the back when I had it out. It is very very clean looking.

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