Re: LCD on VGA flickering
On Dec 30, 1:33*pm, Poutnik <m...@privacy.net> wrote:
> Recently I have bought fresh new
> PHILIPS S-IPS LCD panel 240PW9 1920x1200 60 Hz.
> I have attached it to Intel GMA 3100 integrated graphics ( G33 chipset)
> through VGA/D-SUB(?) connector.
> I have realized the LCD is displaying over otherwise good image
> very broad bands, with pulsing brighness, verz unpleasant to eyes.
> Thez were quickly moving up with frequency of several hertz.
> Similar result was at all resolutions and refresh rates,
> even 1024x768 or 800x600 60/75 Hz.
> But, when I have attached Lenovo Thinkpad notebook,
> with VGA / D-SUB connector too, the image was OK.
> The GMA 3100 graphics was previously attached
> to 15in old CRT monitor 1024x768 75 Hz.
> Screen was small, brightness aged, but otherwise OK and stable.
> What could be the reason of such instability ?
> If the cause is GMA3100, why CRT picture is OK ?
> If the cause is monitor, why it is OK with Notebook ?
> Note that at this time *I have bought
> GAINWARD card based on NVidia GTS 250 with DVI-I connector,
> so there is no issue anymore.
> But I am curious what could be the reason.
> The best depends on how the best is defined.
A flickering LCD screen can be mainly caused bu old or poorly designed
Always update video card drivers and also check for a monitor driver.