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Anyone have experience repairing contact pads on controllers?
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BadMouth:
I'm having trouble with a single button on an Onkyo remote, but same principle.
The rubbery keypad is backed with carbon pads that make contact with the traces on the PCB.

When I took it apart the first time, there was a clear oily substance on the PCB.  (maybe from some kind of plastic or rubber breaking down)
Cleaned everything off and it worked fine for about 6 months.  Repeat, but less oily substance...last only a couple months.
Repeat, lasts only a week.

There is only ever a problem with one button; volume down.
The pad is thin, but still makes good contact.

Anyone know what is going on here?
Ever use something like this? https://www.amazon.com/Keypad-Restore-Conductivity-Carbon-Copper/dp/B0026PRMVM/ref=sr_1_1?ie=UTF8&qid=1498153173&sr=8-1&keywords=keypad+repair

knave:
Try washing all the parts...ie. rubber and plastic parts in 90% or greater alcohol. the oil might be flowing around from somewhere else.
ChadTower:


Yeah, have to take the whole thing apart and figure out where that oil is coming from.
BadMouth:
I cleaned it with 91% isopropyl alcohol each time.  The last time I poured alcohol over both the membrane and pcb, and wiped them until they both appeared spotless.
I will give it another go and look for sources for the contamination.  :-\

I don't think that's the primary issue though because no other button has ever failed to work including the volume up button which is right next to it and used just as much.
(but for some reason seems to have a thicker contact pad)

I was thinking maybe the contact pads are impregnated with something and the oily stuff or my cleaning has diminished it.

I could just glue a piece of metal or another pad in there, but thought maybe someone on here knew a more professional solution.
The real professional solution is probably to throw the remote away (or at least the membrane) and use a new one rather than spend time on it.  :lol
pbj:
I'd superglue a piece of aluminum foil to the back of the membrane.  That repair will outlast you.

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