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    How to Setup An LCD TV To Use As A Monitor ?

    I have just bought a new LCD TV and was going to use the Toshiba 37WLT66 as a monitor. I have an Ati 3850 graphics card and the native resolution of the TV is 1366 x 768 but that resolution is not in the options, only 1360 x 768 which makes the picture blurry.

    Has anyone else had this problem and is there a way round it.

    7 Comments

    Ummmm - haven't used windows for a while now, but from what I can remember you can just go into the ATI config and stretch the screen to fit your display. The main thing to look out for though is the Hz settings IMO, if you set them wrong it could damage your TV.

    Ahh actually just had a look on amazon for your TV, and it states

    Supported Computer Resolutions1024 x 768 (XGA)1280 x 1024 (SXGA)640 x 480 … Supported Computer Resolutions1024 x 768 (XGA)1280 x 1024 (SXGA)640 x 480 (VGA)800 x 600 (SVGA)



    That's why you can't get the max resolution out of it and it looks funny... you'll have to set it to the 1024*768 or 1280*1024 instead as that's the max supported... and see which looks better... but you can probably still tweak it a bit in the ATI panel too to get a better result.

    Original Poster

    The graphics card has DVI output and I have a DVI-HDMI cable. Would I not be able to get the full 1366 x 768 Resolution ?

    joerob1972;6470603

    The graphics card has DVI output and I have a DVI-HDMI cable. Would I not … The graphics card has DVI output and I have a DVI-HDMI cable. Would I not be able to get the full 1366 x 768 Resolution ?



    Not all TVs do 1:1 pixel mapping over HDMI, Does this TV have a VGA connection ?.

    Original Poster

    Yes it has a vga connector, I just thought the hdmi would give a better picture

    joerob1972;6471341

    Yes it has a vga connector, I just thought the hdmi would give a better … Yes it has a vga connector, I just thought the hdmi would give a better picture



    HDMI does give a better picture than VGA because a graphics card is digital by nature and converting to analogue for VGA results in signal degradation. Furthermore, the VGA input of the TV/monitor has to convert the signal back to digital further resulting in a degradation of picture.

    However, as mentioned earlier, your TV does not support 1:1 mapping when connected to HDMI. This is a throwback to the days of CRT where they had black borders around the screen to compensate for analogue signals not being placed centrally on the screen. Overscan on HD Ready TVs compensates for this so the black borders are not needed but the picture is larger than the screen itself. This causes your PC input to the HDMI to be blurred because the picture has been overscanned. So even though DVI or HDMI does give a clearer picture (for TVs that support 1:1 mapping), in your case, the picture is degraded by the overscan and VGA is a better option. Your TV may have a setting for TV mode in HDMI or DVI which switches off overscanning so you may want to check the user guide.

    Original Poster

    ElliottC;6471398

    HDMI does give a better picture than VGA because a graphics card is … HDMI does give a better picture than VGA because a graphics card is digital by nature and converting to analogue for VGA results in signal degradation. Furthermore, the VGA input of the TV/monitor has to convert the signal back to digital further resulting in a degradation of picture.However, as mentioned earlier, your TV does not support 1:1 mapping when connected to HDMI. This is a throwback to the days of CRT where they had black borders around the screen to compensate for analogue signals not being placed centrally on the screen. Overscan on HD Ready TVs compensates for this so the black borders are not needed but the picture is larger than the screen itself. This causes your PC input to the HDMI to be blurred because the picture has been overscanned. So even though DVI or HDMI does give a clearer picture (for TVs that support 1:1 mapping), in your case, the picture is degraded by the overscan and VGA is a better option. Your TV may have a setting for TV mode in HDMI or DVI which switches off overscanning so you may want to check the user guide.



    Thanks will give it a try

    dcx_badass;6471949

    Choose add custom resolution and just add 1366*768. Sorted.



    It won't work when the TV is overscanning. The driver software will allow the screen resolution to be reduced in size to compensate for overscanning but this results in text looking squashed. If overscanning cannot be switched off for the TV then the inferior VGA connection paradoxically gives a superior image.
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