How to determine if problem is video card or monitor?

Archived from groups: alt.comp.periphs.videocards.ati (More info?)

I have an ATI Radeon 9700 Pro and a Mitsubishi Diamond Plus 91 monitor.
At certain combinations of resolution and refresh rates I get these wavy
lines (horizontal lines that sort of move from the bottom to the top of the
monitor).
They are the worst in MS Links Golf where you can set the screen resolution
and color depth but not refresh rates.
I plugged the monitor into my laptop and the problem did not appear, but
it's not really a fair comparison as I could not get the same
resolution/refresh combinations.
Any suggestions? (aside from schlepping the monitor to someone else's house)
6 answers Last reply
More about determine problem video card monitor
  1. Archived from groups: alt.comp.periphs.videocards.ati (More info?)

    A poss cause might be a overloaded PSU or one with poor noise absorption. Try temporarily
    disconnecting loading from the PSU to see what that does. also worth moving plugs around so that
    the one connected to the R9700 is not connected to anything else.

    Early batches of the 9500had the wavy line problem because ATI skimped on a capacitor on the rf
    circuitry. I dont know whether the same problem existed on the 9700, but I fixed it on my 9500 by
    using the DVI output rather than the analog monitor output. May also be worth a try.

    S

    Steven Wandy wrote:
    > I have an ATI Radeon 9700 Pro and a Mitsubishi Diamond Plus 91
    > monitor.
    > At certain combinations of resolution and refresh rates I get these
    > wavy lines (horizontal lines that sort of move from the bottom to the
    > top of the monitor).
    > They are the worst in MS Links Golf where you can set the screen
    > resolution and color depth but not refresh rates.
    > I plugged the monitor into my laptop and the problem did not appear,
    > but it's not really a fair comparison as I could not get the same
    > resolution/refresh combinations.
    > Any suggestions? (aside from schlepping the monitor to someone else's
    > house)
  2. Archived from groups: alt.comp.periphs.videocards.ati (More info?)

    When that happened to me it was a weak power supply. If that is it make sure
    you get a GOOD brand name 400w or better.

    Randy

    "Sham B" <shamb@easynet.co.ukNOSP> wrote in message
    news:408da7a4$0$17396$afc38c87@auth.uk.news.easynet.net...
    > A poss cause might be a overloaded PSU or one with poor noise absorption.
    Try temporarily
    > disconnecting loading from the PSU to see what that does. also worth
    moving plugs around so that
    > the one connected to the R9700 is not connected to anything else.
    >
    > Early batches of the 9500had the wavy line problem because ATI skimped on
    a capacitor on the rf
    > circuitry. I dont know whether the same problem existed on the 9700, but
    I fixed it on my 9500 by
    > using the DVI output rather than the analog monitor output. May also be
    worth a try.
    >
    > S
    >
    > Steven Wandy wrote:
    > > I have an ATI Radeon 9700 Pro and a Mitsubishi Diamond Plus 91
    > > monitor.
    > > At certain combinations of resolution and refresh rates I get these
    > > wavy lines (horizontal lines that sort of move from the bottom to the
    > > top of the monitor).
    > > They are the worst in MS Links Golf where you can set the screen
    > > resolution and color depth but not refresh rates.
    > > I plugged the monitor into my laptop and the problem did not appear,
    > > but it's not really a fair comparison as I could not get the same
    > > resolution/refresh combinations.
    > > Any suggestions? (aside from schlepping the monitor to someone else's
    > > house)
    >
    >
  3. Archived from groups: alt.comp.periphs.videocards.ati (More info?)

    are you over driving the monitor? some resolutions / refresh rates are
    not supported. Is your monitor PnP, and described properly in 'display
    properties'?

    "Steven Wandy" <Swandy@si.rr.com> wrote in message
    news:nPgjc.65722$WA4.3476@twister.nyc.rr.com...
    > I have an ATI Radeon 9700 Pro and a Mitsubishi Diamond Plus 91
    monitor.
    > At certain combinations of resolution and refresh rates I get these
    wavy
    > lines (horizontal lines that sort of move from the bottom to the top
    of the
    > monitor).
    > They are the worst in MS Links Golf where you can set the screen
    resolution
    > and color depth but not refresh rates.
    > I plugged the monitor into my laptop and the problem did not appear,
    but
    > it's not really a fair comparison as I could not get the same
    > resolution/refresh combinations.
    > Any suggestions? (aside from schlepping the monitor to someone
    else's house)
    >
    >
  4. Archived from groups: alt.comp.periphs.videocards.ati (More info?)

    Any chance you left the actual "monitor" max rate fixed
    at 60 hz ? That would sure do it.

    johns
  5. Archived from groups: alt.comp.periphs.videocards.ati (More info?)

    Would not even know how to do that? It's not in any of the setting of the
    menu set into the monitor that I can access.
    "johns" <johnsxxx@mudbog.edu> wrote in message
    news:c6m2o8$mbr$1@kestrel.csrv.uidaho.edu...
    > Any chance you left the actual "monitor" max rate fixed
    > at 60 hz ? That would sure do it.
    >
    > johns
    >
    >
  6. Archived from groups: alt.comp.periphs.videocards.ati (More info?)

    Windows XP picks up the monitor as Plug and Play. I had downloaded a monitor
    driver from NEC's website that allowed me to specify the actual monitor. I
    think that is when my problems started. The screen seems much more stable -
    at all refresh rates - when I reset the drivers to the Plug and Play.
    Strange huh???

    "JAD" <jdemma25@eartink.net> wrote in message
    news:LYkjc.12464$gH6.2189@newsread3.news.atl.earthlink.net...
    > are you over driving the monitor? some resolutions / refresh rates are
    > not supported. Is your monitor PnP, and described properly in 'display
    > properties'?
    >
    > "Steven Wandy" <Swandy@si.rr.com> wrote in message
    > news:nPgjc.65722$WA4.3476@twister.nyc.rr.com...
    > > I have an ATI Radeon 9700 Pro and a Mitsubishi Diamond Plus 91
    > monitor.
    > > At certain combinations of resolution and refresh rates I get these
    > wavy
    > > lines (horizontal lines that sort of move from the bottom to the top
    > of the
    > > monitor).
    > > They are the worst in MS Links Golf where you can set the screen
    > resolution
    > > and color depth but not refresh rates.
    > > I plugged the monitor into my laptop and the problem did not appear,
    > but
    > > it's not really a fair comparison as I could not get the same
    > > resolution/refresh combinations.
    > > Any suggestions? (aside from schlepping the monitor to someone
    > else's house)
    > >
    > >
    >
    >
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