Question about Sony VAIO PCV-W600G PC Desktop

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Specific key contact failure

My shift key does not work. Evidently there is lack of electrical contact below the key when I hit it. Is it possible to remove a particular key and attend to such contact failue, either with screwdriver technology or purchase of a replacement contact pad (the stuff just below the key which is pushed down when u hit the key)?

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  • 2 more comments 
  • kgopalrao Feb 12, 2009

    Is it a micro switch that operates the required contact? could mine be an older design, for I removed the key (the plastic cover with the relevant letter or description that one hits), and found a softish, round, seemingly spring loaded contactor below that gets depresed by hitting the key. This contactor is evidently not making the required contact on whatever is below it (a PCB?). I know I could just chuck it and buy a new keyboard, but it struck me as wasteful in many ways to just throw it away for one single malfunctioning key! Any further ideas?

  • kgopalrao Feb 13, 2009

    Dear Tampa Native,

    Thanks for the info, but isn't there a slight contradiction here. If the micro switch is a spring loaded contactor, how can it be soldered to the circuit board beneath it? Once soldered, to anything, it cant very well move when depressed by a finger hitting the key, and return to original position thro' the spring! Or can it? Would really appreciate an explanation. Thanks.

    K.G. Rao

  • kgopalrao Feb 15, 2009

    Dear Tampa Native,

    Thanks. I get the picture now, and also realise it's not worth my while to try and repair, even if i could do it which i doubt, for my soldering skills are very limited.

    In any case, what do u know, i seem to be way out of touch with keyboard prices. Of course, the last time I looked was several years ago, when i got my current keyboard on which one shift key is kaput, and the cost then was Rupees 1000 (I live in India), i.e. about $25 then. Today, on checking, I find i can get a new one for Rs. 200 at the low end (about $4). Quite affordable, compared to then. How much is it at the low end in the US?

    Thanks once again for the helpful dialogue.

    K.G. Rao

  • kgopalrao Feb 16, 2009

    Dear TampaNative,

    $5? That makes it about the same as here, except that in PPP terms our Rs.200/- is much more expensive.

    Thanks for all the info. It's been a real help in clarifying my ideas. You sound as tho' you're regularly into helping dummies like me. Keep it up. Cheers.

    K.G. Rao

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Desktop keyboards are generally less expensive to replace than repair. But, if you must you should determine if the micro switch below the key is worn out, stuck, or dirty. If stuck or dirty some nonresidual contact cleaner may fix it up. If the switch is bad, some better than average soldering skills will be necessary along with a compatible micro switch.

Posted on Feb 12, 2009

  • 1 more comment 
  • Frank  Fernandez
    Frank Fernandez Feb 12, 2009

    That round spring loaded contactor is the micro switch and it should be soldered to the circuit board beneath it. No further ideas just the ones posted earlier.

  • Frank  Fernandez
    Frank Fernandez Feb 14, 2009

    Not at all. The spring loaded switch is in a housing that has leads/legs/contacts protruding from the housing which make solder contacts to be soldered to the board.

  • Frank  Fernandez
    Frank Fernandez Feb 15, 2009

    I can find decent keyboards from around $5.00 US and up, so it's really not worth the trouble to repair them unless you have the soldering skills and parts laying around.

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