Question about Uniden TCX905 Cordless Expansion Handset

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Nav key stopped working

On both TCX905 handsets (of our Uniden TRU9485), the nav key stopped working in any of the four directions, probably due to dirt intrusion. Before tossing the handsets (aka the whole phone), is there any other option I could try?

TIA,
Park

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  • fasaf Feb 17, 2009

    The nav key or the multi function key is not working on 4 handsets

  • Anonymous Apr 06, 2009

    for all 4 of my uniden phones tcx905, the scroll button is not working... bought new ones. but, i don't have a main base station to plug it in to to set it up... not sure what to do now. will continue to research and then call tech support

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I had the same problem until today. This is what I did:
I opened up the handset and took most of it apart:
There are 2 screws in the battery compartment and you have to push something in on the sides to pull it apart. It won't come completely apart because there are wires connecting to the speaker. There are 5 screws on the inside that hold the board to the phone. I unscrewed those. The buttons are all on 1 rubber sheet. The problem is that the 4 metal connectors under the 4 way button (not on the board, the ones on the back of the rubber) have somehow deteriorated. To fix it I glued a very small piece of tin foil (I used a really thin brand) to each of the 4 connectors. They have to be done separately and the foil can't be too thick or the foil will be touching the board without a button press (found this out the hard way). Test it before tightening the screws to make sure everything worked and then put it back together.
Note: You may need to ground yourself so static electricity doesn't fry the board. If it breaks the phone, don't blame me :) I went this route because it was either play around to find a solution or buy a new phone. I don't know how long this will work for, but I hit all the buttons a bunch of times and they all work.

Posted on Feb 22, 2009

  • donaldh606
    donaldh606 Jul 27, 2012

    I found your solution yesterday. Tried it today with a bit of metal tape and now the handset works perfectly again!

  • Jared G Jul 27, 2012

    Just as a followup - it's apparently been 3 years since I did this and the phones I modified still work without additional tinkering. I did have to do it to another of the phones though.

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