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Which Cable Do I Need? DVI-I to VGA

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Old 09-06-2009, 1:00 AM   #1
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Which Cable Do I Need? DVI-I to VGA

Hi all,

I recently purchased a Technika 22" LCD TV for the bedroom. The problem I'm having is connecting the PC to this TV.

My PC has an HD 4870 graphics card which outputs DVI-I, the TV has a VGA input. I have a DVI lead for which I bought a DVI female to VGA male converter but this did not work both the TV and old monitor report "No signal" using this converter.

Could someone please advise as to where I am going wrong and what cable / converter I should try next?
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Old 09-06-2009, 9:23 AM   #2
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Re: Which Cable Do I Need? DVI-I to VGA

Hi,

A DVI-I to VGA adapter or cable is all you need.

Are you sure the card outputs DVI-I and not DVI-D ? As it could have a DVI-I socket but still only output DVI-D

Have you powered down the PC and tried from a cold boot? As some TV's might be funny with the higher resolution that could be set on your other display (if using one)

Best Regards

Chris
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Old 09-06-2009, 10:30 AM   #3
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Re: Which Cable Do I Need? DVI-I to VGA

Hi Chris,

thanks for your response, I have checked the ATI website and it does say that vga output is supported however I can't seem to find any confirmation of the output.

what would be the implications if the card only outputs DVI-D?

The adapter I bought doesn't seem to indicate if it is DVI-I or not could this be the problem?

I have tried a cold boot with both the old TFT and the new TV still no joy.

Thanks again for your help.
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Old 09-06-2009, 10:52 AM   #4
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Re: Which Cable Do I Need? DVI-I to VGA

If it was DVI-D then it won't work, as that only supports Digital output.

The cable will be DVI-I as this is needed to convert to VGA.

Do you have anything else connected to the graphics card? As you might need to enable the secondary monitor

Best Regards

Chris
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Old 09-06-2009, 11:03 AM   #5
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Re: Which Cable Do I Need? DVI-I to VGA

So it could be the DVI cable causing the problem?

It is a Belkin Pure AV I don't seem to be able to find any info as to whether it is DVI-I or not presumably it isn't?

Do you think it would be worth buying a new DVI cable to see if that would work or I could buy a DVI to HDMI cable and use the single HDMI input on the TV?

I am only running one monitor from the graphics card.

Once again thanks for your help Chris.
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Old 09-06-2009, 11:38 AM   #6
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Re: Which Cable Do I Need? DVI-I to VGA

It won't be the cable as nobody would make a DVI-D to VGA.

However, it could have a fault.

I'm guessing you have the TV / monitor set on DVI not VGA?

Best Regards

Chris
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Thanks from:
stratful (10-06-2009)
Old 09-06-2009, 11:30 PM   #7
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Re: Which Cable Do I Need? DVI-I to VGA

Quote:
Originally Posted by stratful View Post
So it could be the DVI cable causing the problem?

It is a Belkin Pure AV I don't seem to be able to find any info as to whether it is DVI-I or not presumably it isn't?
I suspect that the cable may be the problem. I think the Belkin Pure AV cable is a DVI-D cable which, of course, does not support analogue VGA signals. If so plugging this into your DVI to VGA adapter won't work. You can easily check whether it's a DVI-I or DVI-D by looking at the connectors on the cable. If there is a single horizontal pin on the left hand side it's DVI-D only; if there are an additional 4 pins, 2 above and 2 below the horizontal pin, it's DVI-I. See the pics below...

DVI-D:





DVI-I:





Regards

MikeO
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Thanks from:
stratful (10-06-2009)
Old 10-06-2009, 12:12 PM   #8
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Re: Which Cable Do I Need? DVI-I to VGA

Thank you both for your help.

It is indeed the cable it only has a single bar and not the additional pins as described in the picture.

I think I will go down the DVI to HDMI as the cables appear cheaper than a DVI-I cable!
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