Question about HP Pavilion F1903 19" LCD Monitor

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On switch doesn't always work!

Hi, I have a 19" flat screen HP monitor with the "soft" style on/off swtich. The switch is increasling difficult to operate (my wife and kids couldn't switch it on this morning!). Any tips?

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  • goconno2 Aug 19, 2008

    Hey Benimur, thanks for help; I tried last night but not sure how to get case open (didn't want to damage it!). I removed the four short screws in the corners but this didn't allow removal of front panel. Is it simply clipped on? do I just need to un-clip it or do I need to remove the four fixings in the centre of the back panel (wal mounts I guess)? Or something else?



    Thanks again,



    Gary

  • goconno2 Sep 15, 2008

    Hey Benimur, thanks for help, didn't manage to get around to getting cover off, but swtich did seem to improve in performance; until last night...... I couldn;t get the thing to switch on. So, I managed to get the cover off but........there isn;t a swtich as such, it's just a "ribbon" type strip that seems to intergrated into the front cover. I didn't want to pull it put as I'm worried I may damage it or not be able to get it back in. I don't know what to do now?

  • goconno2 Sep 15, 2008

    Ok, I can see through the soft button to the trace on the ribbon, does this mean the carbon contact has worn away? Is there anything I can do with it?

  • goconno2 Sep 16, 2008

    Fixed it with a bit of silver foil under the outer soft switch. This keeps the contact open when not depressed and makes it when pressed. thanks for your help.

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  • Master
  • 6,966 Answers

Hi,

Assuming no other fault other than the switch itself, it would require that the unit be opened and the switched exposed. Underneath the button would be the actual switch. it is possible that:

  • cold solder - would require re-application of heat through a soldering iron;
  • dirty contacts - initially try electronic contact cleaner or if still a no go, then replacement;
Often the repair is rather quick and easy, what might be more demanding would be opening the case/paneling to expose the switch. Should you be uncomfortable going through this route, then perhaps your best bet would be to seek the services of a qualified professional. In considering a DIY (do-it-yourself), familiarity with electronic components and circuitry is a necessity.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Aug 18, 2008

  • 1 more comment 
  • Louie  Role
    Louie Role Aug 19, 2008

    Hi again,

    Appreciate the postback.

    To your concern, very often the two halves are held in place by snap on locks. You would need a spatula like tool to force insert between the two halves and slowly move it along. It will reach a point where it will be stopped by the interlocks. You would need a small flat bladed screw driver to unsnap these locks. Another tool would be needed to keep the area that you have separated apart while going through again with the spatula tool on the other sections.

    It is not uncommon to have scratches. There are even instances that the locks are sheared/snapped off. The secret is to do it slowly.


  • Louie  Role
    Louie Role Sep 15, 2008

    The switch is a soft switch, something similar to the keypad of cellphones where the switch contacts are the trace themselves on the ribbon. The actual contact is provided by a carbon looking part on the internal end of the push button.

  • Louie  Role
    Louie Role Sep 15, 2008

    possibly as you posted but another possibility is that what it is switching is the culprit. often designs such as this relies on a switching component, the manual switch is actually triggering another component that does the actual switching.
    try first if you can clean the soft switch, again just like in cellphones, the membrane/carbon could be lifted away from the trace. doing so would allow you access to both and therefore clean.


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