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DVI to HDMI cables |
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#1 |
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Join Date: Dec 2008
Posts: 25
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DVI to HDMI cables
It was said to me this afternoon that a DVI to HDMI cable will only work one way eg from a DVI source to a HD TV with a HDMI input and not the other way and that you have to get a HDMI to DVI cable for this purpose.
Now I feel my middle leg was being pulled and bells were ringing but could it be true? |
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#2 |
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Join Date: Sep 2005
Posts: 17,338
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From what I have read they are bisexual.
![]() I have a DVI to HDMI cable connecting my PC and panel, although I have a HDMI DVD recorder my PC probably wouldn't notice so no use me pulling that to bits to check. Should that be bidirectional? ![]()
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#3 |
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Join Date: Dec 2008
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Quote:
From what I have read they are bisexual.
![]() I have a DVI to HDMI cable connecting my PC and panel, although I have a HDMI DVD recorder my PC probably wouldn't notice so no use me pulling that to bits to check. Should that be bidirectional? ![]() ![]() Total confused !!! |
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#4 |
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Join Date: Jun 2003
Location: Cheshire
Posts: 6,462
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Quote:
It was said to me this afternoon that a DVI to HDMI cable will only work one way
There is a difference in the types of signals that HDMI and DVI will carry, but there shouldn't be an issue with directionality. PC DVI can be digital (called DVI-D) which is compatible with the HDMI PC DVI can be analogue (called DVI-A) which is not compatible with the HDMI PC DVI can be a dual format signal i.e. both analogue/digital depending on the connections and capabilities of the source and display. This is called DVI-Intergrated or DVI-I for short. This gives both options, but only the digital signal is compatible with a HDMI socket. Computers, TVs, DVI & HDMI: Another important difference between DVI and HDMI is the content protection feature called HDCP. Anything with a HDMI socket must have the ability to handle a HDCP encrypted signal. Since DVI comes from the computer world the need for HDCP handling is not as clear cut. Some devices have it, others don't. The user manual or spec sheet will usually tell you what the situation is. |
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#5 |
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Join Date: Mar 2006
Location: Scottish Borders
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I have an HDMI to DVI lead, and it is definitely bi-directional.
I have used it both to connect the DVI output of a computer to the HDMI input of a monitor, and to connect the HDMI output of a set top box to the DVI (HDCP) input on a television. There's no problem with the cable, but wether the connection works depends on all the complicated stuff covered by Chris Frost above.
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#6 |
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Join Date: Dec 2008
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Quote:
I have an HDMI to DVI lead, and it is definitely bi-directional.
I have used it both to connect the DVI output of a computer to the HDMI input of a monitor, and to connect the HDMI output of a set top box to the DVI (HDCP) input on a television. There's no problem with the cable, but wether the connection works depends on all the complicated stuff covered by Chris Frost above. ![]() The HDMI from the sat box to the DVI on the tv works with the lead but comes up with an OUT OF RANGE message on screen. The man a Currys was trying to say that the cable is a PC one making the TV think it is a PC input not a TV in put. Think I will just sell the freesat box on ebay and forget HD |
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#7 |
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Join Date: Jun 2003
Location: Cheshire
Posts: 6,462
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Quote:
Sounds like the cable I have is faulty.
The HDMI from the sat box to the DVI on the tv works with the lead but comes up with an OUT OF RANGE message on screen. First, grab the TV manual and have a read about the DVI socket. What you are looking for is the types and resolutions of signal it will handle. Check if it will handle these:[LIST][*]720p/50 - A.K.A. 750(720) / 50p[*]1080i/50 - A.K.A. 1125(1080) / 50i[/LIST] Next, have a look at the Freesat instructions. See what you have to do to make the box send out either 720p or 1080i. Note: you might have to hook up a temporary SCART lead just so you can see the menus whilst setting up the Freesat box's HD output. Once you're ready to try it then switch the TV to the DVI input. |
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#8 |
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Join Date: Dec 2008
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The manual is so limited it is usless. It says the TV will hadle 480/576i 480/576p 720p 1080i mode.
then this is what it says. 1. Connect the set top box, press TV/AV on the remote control to select RGB DTV. 2. Tune to set top box That is it. |
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#9 |
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Join Date: Jun 2003
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Quote:
It says the TV will hadle 480/576i 480/576p 720p 1080i mode.
![]() Now it's just a question of setting the Freesat box correctly and trying to get a picture. Remember to hook up a SCART so you can see the Freesat menus whilst the HDMI/DVI isn't working. PS - there's no 'tuning' to be done on the TV except for making sure the settings are correct. |
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#10 |
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Join Date: Dec 2008
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On 576p I get a great detailed picture but it is in the top left of the screen with the message out of range
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#11 |
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Join Date: Jun 2003
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What happens with the Freesat box on 720p or 1080i?
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#12 |
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Join Date: Dec 2008
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if I set it to 720p I get the picture in the top 3/4 of the screen, on 1080i the picture fills the screen but thepicture is to big. I suspect there is a hidden menu on the tv to change inputs spec.
If connected by scart it is fine but not HD |
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#13 |
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Join Date: Jun 2003
Location: Cheshire
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This could be the aspect ratios on the TV.
Can you find a button on the remote that changes the picture shape between wide - 16:9 - letterbox - zoom - 4:3 - etc? Also check on the Freeview box for anything in the setup menus to do with the TV shape. If there is an option then you want 16:9. |
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#14 |
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Join Date: Mar 2006
Location: Scottish Borders
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I've got a Philips TV with a DVI (HDCP) input that is used for both a computer and an HD source (not at the same time).
If you have a computer connected you select "PC" with the AV input button on the remote, if you have an HD source connected you select "HD". I have a Humax Foxsat HD sat box which works perfectlly with the TV when it is set to the "HD" input, but I don't think it gives a picture when you set it to "PC" input. Unfortunately I can't test, because they are in different rooms at the mo. My only point is, make sure you have the right AV input selected on the telly. |
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#15 |
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Join Date: Dec 2008
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Tried all screen sizes and outputs from the freesat box and it makes no difference. The AV input I have no control over, it comes through where it wants.
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#16 |
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Join Date: Jun 2003
Location: Cheshire
Posts: 6,462
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Well, you got a picture now so that's some progress at least
![]() Do you know anyone with a HDMI equipped DVD player you could try? That would help you work out if the problem is in the TV or something to do with the Freesat box. |
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#17 |
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Join Date: Dec 2008
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Hi Chris. Tried the freesat box on a LCD tv and it worked and tried a new HDMI to DVI cable to my tv and the same problem happened so it has to be the telly.
I have emailed all the makers web addresses for info so if and when I get a solution I will post it on here. It will be so simple when I get the answer I just know it. |
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#18 |
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Join Date: Jun 2003
Location: Cheshire
Posts: 6,462
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Thanks. Let us know how you get on
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