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Thread: screen

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    3 Star Lounger
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    screen

    What could be causing everything on a screen to be blurry? Have tried adjusting the setting on the actual monitor and it doesn't help. The font, icons, everything is fuzzy. This is an off brand screeen, 5 years old.
    lynndelap

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    Uranium Lounger
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    Re: screen

    The electron guns are probably wearing out. For five years old, that's not unusual. You might want to look on the back of the monitor's housing to see if there are pinholes where you can adjust the focus and/or/drive strength, but if you don't want to mess with it....you may want to start thinking about a replacement.
    -Mark

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    Uranium Lounger viking33's Avatar
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    Re: screen

    Right on, Mark.
    A monitor tube is just a big electron vacume tube and as such they will develop weak emission, inter-element shorts, phosphor burn
    (even gas of all things!) <img src=/S/fire.gif border=0 alt=fire width=15 height=15> etc. Adjustments may help in the short term, but a 5 year old monitor is about ready for retirement. <img src=/S/sad.gif border=0 alt=sad width=15 height=15>

    Bob
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    Plutonium Lounger
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    Re: screen

    And a good excuse ta buy one a dem PRETTY new flat screen beauties, heh heh heh! Prices are really within reach now, eh? In a way, I keep thinking that mebbe this two year old 19" desk hog I have will decide to take a vacation.....

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    Re: screen

    In addition to Mark's advice, do be careful if sticking anything in the back of a monitor. Correct me if I'm wrong anyone, but the back of a cathode ray tube carries hundreds if not thousands of volts and every single one is ready to light you up like a Christmas tree. Even if the monitor is switched off and unplugged, it can hold a voltage for reasonably long period. Just a friendly warning.

    Does the monitor have an on-screen adjustment control? If it does, is there any mention of changing the 'convergence' settings? I have a 21" ProNitron which has a tendancy to lose it's clarity from time to time. The convergence setting alters the landing point for the three guns (R, G & [img]/forums/images/smilies/cool.gif[/img] and ensures each beam falls on the same spot. Failing that, does it have a 'degauss' button or function?

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    Re: screen

    <hr>In addition to Mark's advice, do be careful if sticking anything in the back of a monitor. Correct me if I'm wrong anyone, but the back of a cathode ray tube carries hundreds if not thousands of volts and every single one is ready to light you up like a Christmas tree. Even if the monitor is switched off and unplugged, it can hold a voltage for reasonably long period.<hr>
    I'd call it an unreasonably long time. In the order of days, if not weeks.
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    Uranium Lounger viking33's Avatar
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    Re: screen

    Any CRT or TV will hold a residual charge in it's high voltage area that will knock you off your feet if you get careless. It will NOT carry much AMPERAGE, so the result is a bad shock but not a particularly dangerous one.

    The holes referred to by Mark are access points to be used for alignment purposes and only an insulated tool should be used there both for safety and for the fact that metallic tools combined with the capacity (electrical not quantity) of your hand will affect the alignment settings.
    Convergence settings should only be done along with the proper alignment pattern generators, etc. and not attempted by only "eyeballing" the screen. Guaranteed, you might improve one part of the screen but leave another in worse shape than before.

    Degaussing as Fish mentioned is something to look for and do if your tube is set to do it. I have a Sony A400 19" and I hit the degauss button every month or two as a regular maintenance thing.

    Good Luck,
    Bob
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