High Def Forum
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Computer to HDTV

03-11-2005, 05:29 PM
I have a Mitsubishi 55" HDTV. I have had it for a while, so it does not have DVI, HDMI, ir a VGA connection. It does have component and RGBHV inputs. I am using a Radeon 9550 video card, but cannot seem to get the quality I am looking for using S-Video. I just bought a cable that goes from VGA to RGBHV however the only picture I can get is black and white. Can anyone tell me what the best way view a computer on an HDTV is, or what I may be doing wroung when using the cable I just recieved.

Thanks in advance.

03-11-2005, 06:08 PM
You're close... RGBHV is just VGA with a different connector. Your breakout cable is just what you need. You may have to configure your TV to be expecting RGBHV instead of Y/Pr/Pb on that input.

SVideo is HORRIBLE for a PC desktop. It is limited to 480i30 SDTV res.

03-11-2005, 09:20 PM
I set my TV to expect RGB, there was no setting for RGBHV, so I assume it does that automatically. So far I have only been able to get any distinguishable picture if I use the DVI out from my video card, and use a DVI to VGA adapter. If I use my breakout cable from the VGA port on the card, the picture on the TV is just a bunch of lines moving through the screen. Curently my graphics settings are 800x600 with 16 bit color. Also I don't know in the properties of the video card under displays, if it should be set to TV or Monitor. I tried it both ways, and only get a picture if it is set to TV. Any more help would be great.

Thanks again.

03-12-2005, 09:03 AM
If you are using a breakout cable VGA to RGB+HV then you must set the resolution of your graphincs card to 1920x1080 at 30Hz, or 1080x720 at 60 Hz.

03-12-2005, 03:00 PM
For his CRT based RPTV, one semi-standard mode that might work well is wide EDTV, 848 x 480. Make sure refresh is set to ONLY 60 Hz.

03-12-2005, 10:00 PM
Okay, I think I am getting closer. I have both my monitor, and my TV connected to my video card. When I set the resolution to 1920x1080 or 1080x720, the TV recognizes it as a 480p siginal, at one point is even said it was 1080i. It is in color, but now the image scans from top to bottom. It also looks like it is two of the same image on the screen. I have tried a bunch of different resolutions, but most of them are doing the same thing or nothing at all. I have powerstrip and have played around with it, but all I have done is fooled with the custom resolutions. I'm not sure what else to try. Any more help would be great.

03-13-2005, 08:24 AM
You'll have to check your manual to find what PC formats are compatible. Never use a refresh faster than 60 Hz, it can damage your TV.

Common wide resolution which might work are 1920 x 1080 (interlaced only), 1280 x 720 progressive, or 848 x 480 progressive. Progressive modes are better for PC use.