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32PF9986 Connect To Pc Problem - Pls Help

Discussion in 'LCD & LED LCD TVs' started by cushty, Jan 28, 2005.

  1. cushty

    cushty
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    Hi Guys, hopefully somebody here can point me in the right direction

    I have just purchased a Philips 32pf9986 and currently having big problems connecting my PC

    Details are:

    Nvidia fx5200 with VGA and S-vid out (..... NO DVI-I.....)
    VGA cable from VGA port on the graphics card with VGA / DVI adaptor to the philips 32pf9986

    problem is when i boot the PC nothing appears on the LCD TV

    I have tried various resolutions ie 800x600 ... 1024x768 etc etc

    What is VERY strange is that if i boot the PC with my standard 17" TFT VGA monitor and then swap the VGA cables...ie connect the LCD TV everything displays fine ...

    Also I have used Remote connection (VNC) to check what happens when the PC boots up connected to the philips LCD TV, Nvidia detects the LCD etc etc, but still nothing is displayed on the actual LCD TV

    Has anybody had problems getting a pictured displayed on their LCD from their PC ?????????

    Should I buy a graphics card with a DVI-I out port ?????????? and then use DVI out to DVI cable to DVI in on the TV etc etc , maybe this would fix my problem !!!!!

    By the way I am running Media Center 2005 o/s
     
  2. Philips32pf9986

    Philips32pf9986
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    Hello,

    Just bought one of these LCD's my self.
    I have a DVI graphics. When I connect my pc via the DVI cable I get a video signal.
    However the picture doesn’t cover the whole of the screen. There doesn’t seem to be much on the connectivity section of the manual either.
    I went to Comet to ask what the problem would be but, got the tool man tailor grunt.

    Only thing for me to try now is to connect using a standard vga cable and use the DVI connector that comes with the Philips.

    Will post my findings.

    p.s.
    If you have a spare video card it would be a good idea to see if you have the same problem with that.

    Rakesh
     
  3. Rob1698

    Rob1698
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    Unfortunately, there is no mode that outputs PC video in one-for-one pixel mode on the LCD (1366x768 resolution). I don't understand why this is, apart from the "fact" that 1366 is not a standard resolution in Windows and so Philips thought it would be better not to support it because the users would not understand it.

    The TV supports (according to the manual) only 4:3 resolutions (640x480, 800x600 and 1024x768) which can then be displayed as-is (the 1024x768 resultion is one-for-one pixel) but leaves large black bars on the side.
    The picture can also be set to "widescreen" in which case the picture is "stretched" and the h/v ratio is bad. And on 1024x768 it does not fill the entire display width.
    Note that PC LCD screens are 15:9, not 16:9 when they are widescreen. It looks like the used area on widescreen is the 15:9 sized area.

    I tried to output 1280x768 on the XVGA mode (via VGA cable) and it seems to work. Not completely certain if it is really showing 1280 pixels or if these age read as 1024 and then scaled up to 1280. Of course the h/v ratio is OK in this case but the picture still doen't fill the screen.

    When you set the frequencies to those of 720p HDTV, the TV accepts the signal also from a PC source (so it does not need to be component video, as the manual says). This yields a 1280x720 picture that is one-for-one pixel and looks very sharp and steady. But of course it has a black border all around :-(

    Finally you can set the PC to output 1080i HDTV. This yields a screen-filling picture on the TV, but it is downscaled from 1920x1080 to the 1366x768 LCD resolution, so not one-for-one pixel :-(
    It also is interlaced, so you get lineflicker. And it honours the SMTPE standard overscan (about 20 pixels) so you don't see the entire PC output (menubars will be partly off-screen).

    All in all, it is a mess. Philips, please give us 1366x768 one-for-one pixel PC mode. This is a must for mediacenter etc.

    For those using Linux (like me), here are the modelines I use with XFree86/Xorg. They are twiddled so that you can center the 1024x768 XVGA PC picture, and all other modes will be centered as well. When putting more than one of these modelines in the active config, you can cycle through them with Ctrl-Alt-+ and the TV will follow.

    Section "Monitor"
    DisplaySize 695 390
    HorizSync 28-50
    Identifier "Monitor[1]"
    ModelName "32PF9986"
    Option "DPMS"
    VendorName "Philips"
    VertRefresh 49-61
    UseModes "Modes[1]"
    EndSection

    Section "Modes"
    Identifier "Modes[1]"
    Modeline "1280x768" 81.25 1280 1312 1480 1680 768 771 773 806
    Modeline "1024x768" 65.00 1024 1048 1184 1344 768 771 773 806
    Modeline "1280x720p50" 74.25 1280 1724 1772 1980 720 723 725 750
    Modeline "1280x720p60" 74.11 1280 1392 1440 1648 720 723 725 750
    Modeline "1920x1080i50" 74.25 1920 2440 2456 2640 1080 1083 1085 1125 Interlace
    Modeline "1920x1080i60" 74.25 1920 1976 2008 2200 1080 1083 1085 1125 Interlace
    EndSection

    Section "Screen"
    DefaultDepth 24
    SubSection "Display"
    Depth 24
    Modes "1920x1080i50" "1280x720p50" "1280x768" "1024x768"
    EndSubSection
    Device "Device[1]"
    Identifier "Screen[1]"
    Monitor "Monitor[1]"
    EndSection
     

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