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Trouble with monitor

Discussion in 'Electronic Basics' started by Nikki, Dec 9, 2005.

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  1. Nikki

    Nikki Guest

    Hi Guys
    Is anyone in this group knowledgeable about computer Monitors.
    If so I have a question.
    I have a 4 1\2 year old 19 inch Monitor (tube type) by ViewSonic for
    awhile now the display has being somewhat dime. I have the brightness
    at 100% and it’s still hard to make out parts of a jpg that have dark
    colours in them. In your opinion is the monitor worth fixing. If it’s
    a component that could be changed for around $100 I would get it fixed
    or is this type of problem related to the picture tube itself.
    Thanks for any advice
    Nikki
     

  2. Wrong newsgroup. You are looking for
     
  3. Nikki

    Nikki Guest

    Thanks
    Nikki
     
  4. Rich Grise

    Rich Grise Guest

    For $100.00, it's a judgement call whether you want to get this one fixed,
    or just pick up a new one. CRT monitors are dirt-cheap these days, now
    that everybody's going flat-screen.

    http://search.ebay.com/computer-monitor_W0QQfkrZ1QQfromZR8

    Good Luck!
    Rich
     
  5. Pooh Bear

    Pooh Bear Guest

    If it's only 4 1/2 yrs old I wouldn't expect the tube to be knackered.

    Low brightness may indicate a power supply problem for example.

    See if you can get a quote to establish the fault first.

    Graham
     
  6. Bob Myers

    Bob Myers Guest

    If the monitor was in continuous service over that period, that's
    over 35k hours - way beyond the typical time-to-half-bright for
    a CRT. This sounds like a classic worn-out tube; upping the
    internal brightness adjustment (as opposed to the external "user"
    control, which is typically limited in range) will help temporarily,
    but that tube's definitely on the way out and nothing can be done
    to truly "fix" it.

    For what CRT monitors - or even LCDs - cost these days, the
    only cost-effective answer is junk-and-replace.

    Bob M.
     
  7. Bob Myers

    Bob Myers Guest

    messag
    If the monitor was in continuous service over that period, that'
    over 35k hours - way beyond the typical time-to-half-bright fo
    a CRT. This sounds like a classic worn-out tube; upping th
    internal brightness adjustment (as opposed to the external "user
    control, which is typically limited in range) will help temporarily
    but that tube's definitely on the way out and nothing can be don
    to truly "fix" it

    For what CRT monitors - or even LCDs - cost these days, th
    only cost-effective answer is junk-and-replace

    Bob M
     
  8. will-mei

    will-mei Guest

    just replease it
     
  9. Jasen Betts

    Jasen Betts Guest

    I have an old viewsonic here (sticker on the back says "June 1999"), I got
    it gratis, it its previous life it was displaing some diagnostic 24/7 so
    there's a bit of burn in and the image was dim, too dim to read easily in
    a well lit room.

    I took the back off and after a 30 minute warm-up turned up the screen
    and adjusted the focus controls. works great now. (except for the burn in
    but it's just rectangular patches near the edges and easy to ignore.)

    screen and focus controls are on the side of the flyback transformer,
    (black plastic thing other end of the wire attached to the rubber "sucker"
    looking thing on the top of the picture tube) there's dangerous voltages in
    that area so work with one hand only (and don't rest the other on an earthed
    PC case for example)

    I used a clamp and a piece of wood to stabalise the front of the monitor
    so as not to put too much stress on the circuit board.

    I also used rigid platic to support the circuit board (CD cases etc)
    but mainly because my working surface was contaminaated with metal
    particles.

    I used an insullated screwdriver to adjust the controls - mainly to keep my
    hands away from the live parts the controls are insulated.

    screen is like a master brightness control one good way to set is it to turn
    the brightness up to about 10% and display an image with mostly black
    (full-screen text mode console in windows or linux is a easy one)
    and then in a mostly darkened room turn the screen down until it stops
    glowing.

    focus is, well, focus. the default X-windows bagckground it a good focus
    pattern (1 pixel checkerboard pattern) but any screen full of text will do
    almost as well.

    Bye.
    Jasen
     
  10. Rich Grise

    Rich Grise Guest

    Do you mean, like, give it an ice-cream cone, and then give it another?
    ;-P

    Cheers!
    Rich
     
  11. k wallace

    k wallace Guest

    that would go far to repleasing me! Make it chocolate.
    ;)
    karinne
     
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