INDEX  F.A.Q.  SEARCH  LATEST POSTS     Rules  Register  Profile  Private messages  Login


Search all forums or this forum: Advanced search
DVI output problem
Forum Index -> Video -> Digital TV / DVB / HDTV Printer-friendly version
Goto page 1, 2  Next
Reply to topic
Author Message
1234567
Member


Joined: 08 Jun 2006
Location: usa
Post Posted: Feb 18, 2008 18:59 Posts Comp View users profile Send private message Reply with quote
I got a cable HDMI to DVI to connect the LCD Tv and my PC. But the cable is not sending me signal. I got and tried DVI single cable



and no signal is coming on my TV.

In the store I can find only DVI-D dual link cables, but my PC has DVD-I dual link output, that is little bit different(see that from the ilustrations). Can DVD-D cable help me to replace DVD-I cable, (beacuse I can not find DVD-I cable...) Help please...Thanks!

edDV
Member


Joined: 06 Mar 2004
Location: Northern California, USA
Post Posted: Feb 18, 2008 19:12 Posts Comp View users profile Send private message Reply with quote
TV make/model number?
Check your TV manual to find resolutions supported. Most accept only 1920x1080i or 1280x720p for HD. Start with 720x480i to establish port is working.

Almost no LCD-TV sets use dual link.
The issue is something else.
_________________
Recommends: Kiva.org - Loans that change lives.
http://www.kiva.org/about

jagabo
Member


Joined: 09 Dec 2005
Location: none
Post Posted: Feb 18, 2008 19:13 Posts Comp View users profile Send private message Reply with quote
DVD-I adds analog outputs on the left side (as pictured). A DVD-D cable will plug into the DVD-I connector but will only carry the digital data. HDMI doesn't use the analog so it doesn't matter to you.

edDV
Member


Joined: 06 Mar 2004
Location: Northern California, USA
Post Posted: Feb 18, 2008 19:31 Posts Comp View users profile Send private message Reply with quote
The HDMI connector (19-pin version) used on consumer video equipment is always single link and corresponds to DVI-D single link.

If you have dual link or analog pins on one end of a DVI-D to HDMI cable they aren't connnected to anything. The extra wires in a HDMI to HDMI cable are used for audio and control. Those wires aren't supported by DVI.

There is a dual link version of HDMI (Type B) but the connector has 29 pins and is wider. It is rarely used.
_________________
Recommends: Kiva.org - Loans that change lives.
http://www.kiva.org/about

1234567
Member


Joined: 08 Jun 2006
Location: usa
Post Posted: Feb 18, 2008 20:02 Posts Comp View users profile Send private message Reply with quote
edDV wrote:
TV make/model number?
Check your TV manual to find resolutions supported. Most accept only 1920x1080i or 1280x720p for HD. Start with 720x480i to establish port is working.

Almost no LCD-TV sets use dual link.
The issue is something else.


No, the problem consists on PC DVI output, nothing with TV output( The TV intput is HDMI).

p.s. My TV is Samsung LCD LNT4661

http://www.samsung.com/us/consumer/detail/detail.do?group=televis ... 4661FX/XAA

Last edited by 1234567 on Feb 18, 2008 20:15, edited 1 time in total
edDV
Member


Joined: 06 Mar 2004
Location: Northern California, USA
Post Posted: Feb 18, 2008 20:12 Posts Comp View users profile Send private message Reply with quote
1234567 wrote:
edDV wrote:
TV make/model number?
Check your TV manual to find resolutions supported. Most accept only 1920x1080i or 1280x720p for HD. Start with 720x480i to establish port is working.

Almost no LCD-TV sets use dual link.
The issue is something else.


No, the problem consist on PC DVI output, nothing with TV output.

p.s. My TV is Samsung LCD LNT4661


There is no HDMI output on a LCD LNT4661, only HDMI inputs. You need to switch the TV to the HDMI input being used.

The DVI-D output on your graphics card uses only the DVI-D single link pins over a DVI-HDMI cable. The card needs to be set to dual monitor mode and a compatible video size (see TV manual). As a start set second monitor out to 720x480p 60Hz. If that works try 1280x720p or 1920x1080i.
_________________
Recommends: Kiva.org - Loans that change lives.
http://www.kiva.org/about

1234567
Member


Joined: 08 Jun 2006
Location: usa
Post Posted: Feb 18, 2008 20:16 Posts Comp View users profile Send private message Reply with quote
edDV wrote:
1234567 wrote:
edDV wrote:
TV make/model number?
Check your TV manual to find resolutions supported. Most accept only 1920x1080i or 1280x720p for HD. Start with 720x480i to establish port is working.

Almost no LCD-TV sets use dual link.
The issue is something else.


No, the problem consist on PC DVI output, nothing with TV output.

p.s. My TV is Samsung LCD LNT4661


There is no HDMI output on .


Pardon me, input I will like to say... wink.gif

edDV
Member


Joined: 06 Mar 2004
Location: Northern California, USA
Post Posted: Feb 18, 2008 20:24 Posts Comp View users profile Send private message Reply with quote
Page 44-46 of your manual.

The following resolutions are supported by the 4661F.
The lower ones are for the HDMI port and the upper ones when using a DVI-I to VGA connection.

_________________
Recommends: Kiva.org - Loans that change lives.
http://www.kiva.org/about

jagabo
Member


Joined: 09 Dec 2005
Location: none
Post Posted: Feb 18, 2008 20:26 Posts Comp View users profile Send private message Reply with quote
I have a nvidia 8600GT running at 1920x1080 60p hooked up to a Samsung 4665 with a dual link DVI-D->HDMI cable. I have found that several resolutions not listed in the manual will work.

I think he's wrong, but according to budz in this post:

http://forum.videohelp.com/topic345553.html#1814525

the DVI->HDMI cable won't work at all if the DVI port doesn't support HDCP.

1234567
Member


Joined: 08 Jun 2006
Location: usa
Post Posted: Feb 19, 2008 14:52 Posts Comp View users profile Send private message Reply with quote
edDV wrote:
Page 44-46 of your manual.

The following resolutions are supported by the 4661F.
The lower ones are for the HDMI port and the upper ones when using a DVI-I to VGA connection.


At this point my friend, is possible to get the signal from PC to my TV using HDMI-DVI-D cable? My PC-videocard is NVIDIA Geforce 7600 with 2 DVI-I outputs, dual links? Thanks!

edDV
Member


Joined: 06 Mar 2004
Location: Northern California, USA
Post Posted: Feb 19, 2008 15:19 Posts Comp View users profile Send private message Reply with quote
1234567 wrote:
edDV wrote:
Page 44-46 of your manual.

The following resolutions are supported by the 4661F.
The lower ones are for the HDMI port and the upper ones when using a DVI-I to VGA connection.


At this point my friend, is possible to get the signal from PC to my TV using HDMI-DVI-D cable? My PC-videocard is NVIDIA Geforce 7600 with 2 DVI-I outputs, dual links? Thanks!


Forget dual link, it doesn't apply. The 4661F has no dual link capability.

I have a 7600GT NVidia and feed HD off second port at 1920x1080p for Samsung 4665 or 1080i to my HD CRT or 1366x768p (native) for other LCD-TV sets.

The DVI-D (DVI-I is irrelevant) to HDMI (all single link) cable should work fine so long as the NVidia control panel settings match one of the modes supported by the TV.
_________________
Recommends: Kiva.org - Loans that change lives.
http://www.kiva.org/about

1234567
Member


Joined: 08 Jun 2006
Location: usa
Post Posted: Feb 19, 2008 16:03 Posts Comp View users profile Send private message Reply with quote
edDV wrote:
1234567 wrote:
edDV wrote:
Page 44-46 of your manual.

The following resolutions are supported by the 4661F.
The lower ones are for the HDMI port and the upper ones when using a DVI-I to VGA connection.


At this point my friend, is possible to get the signal from PC to my TV using HDMI-DVI-D cable? My PC-videocard is NVIDIA Geforce 7600 with 2 DVI-I outputs, dual links? Thanks!


Forget dual link, it doesn't apply. The 4661F has no dual link capability.

I have a 7600GT NVidia and feed HD off second port at 1920x1080p for Samsung 4665 or 1080i to my HD CRT or 1366x768p (native) for other LCD-TV sets.

The DVI-D (DVI-I is irrelevant) to HDMI (all single link) cable should work fine so long as the NVidia control panel settings match one of the modes supported by the TV.


My friend. I am telling you that beacuse I tried HDMI-DVD-D( single link) cable and I has bad result, so no signal to my TV. Now I find on the store HDMI-DVI-D dual link cable, and I do not know if it's gonna work or not.

jagabo
Member


Joined: 09 Dec 2005
Location: none
Post Posted: Feb 19, 2008 16:45 Posts Comp View users profile Send private message Reply with quote
If single link doesn't work, dual link won't either. The extra six pins of the dual link DVI connector are not connected to anything at the HDMI end.

Note: there is a dual link HDMI connector but it doesn't appear on any consumer device. I've never seen one but it has 29 pins instead of 19.

Last edited by jagabo on Feb 19, 2008 16:59, edited 1 time in total
1234567
Member


Joined: 08 Jun 2006
Location: usa
Post Posted: Feb 19, 2008 16:54 Posts Comp View users profile Send private message Reply with quote
jagabo wrote:
If single link doesn't work, dual link won't either. The extra six pins of the dual link DVI connector are not connected to anything at the HDMI end.


Look. From the book of Samsung TV, is sure that HDMI to DVI cable is one possibility, of connecting TV and PC. (The second way is VGA to DVI cable). So, I am not agree with the opinion that HDMI to DVI cable can not send the signal from PC to my TV. So, teoriacally speaking, you are wrong, beacuse the book of Samsung tells that. The real problem is that what kind of HDMI-DVI cable, is possible to do that, or what kind od DVI cable output is near to my DVI-I dual link PC output. wink.gif

louthewiz
Member


Joined: 02 May 2003
Location: United States
Post Posted: Feb 19, 2008 17:00 Posts Comp View users profile Send private message Reply with quote
Your problem is that your video card is not DVI-D ,it's DVI-A/I which is analog and that's why you get no picture .
Now if you use a DVI-A-I to component video cable like in the link below then you will get a picture.

http://www.monoprice.com/products/product.asp?c_id=102&cp_id= ... p;format=2

jagabo
Member


Joined: 09 Dec 2005
Location: none
Post Posted: Feb 19, 2008 17:02 Posts Comp View users profile Send private message Reply with quote
1234567, Don't be silly. Of course it's possible to use a DVI->HDMI cable to connect a computer graphics card to an HDTV. We all know this. Both edDV and I use them with our Samsung HDTVs.

The point is that if your single link DVI->HDMI cable isn't working a dual link DVI->HDMI cable won't either. The problem is not single vs dual link DVI. But if you're not convinced just buy the cable and find out.

louthewiz may be correct -- the second DVI port on your graphics card may only carry the analog data (DVI-A).

1234567
Member


Joined: 08 Jun 2006
Location: usa
Post Posted: Feb 19, 2008 17:26 Posts Comp View users profile Send private message Reply with quote
jagabo wrote:
1234567, Don't be silly. Of course it's possible to use a DVI->HDMI cable to connect a computer graphics card to an HDTV. We all know this. Both edDV and I use them with our Samsung HDTVs.

The point is that if your single link DVI->HDMI cable isn't working a dual link DVI->HDMI cable won't either. The problem is not single vs dual link DVI. But if you're not convinced just buy the cable and find out.

louthewiz may be correct -- the second DVI port on your graphics card may only carry the analog data (DVI-A).


Ok, tell me. Why my LCD monitor, is getting the signal form my PC, from DVI PC output, and the LCD TV is not geeting the signal from the same PC? Do you understand? Something is missing me, my friend... rolleyes.gif wink.gif
Anyway thanks for your help. The best thing maybe is to buy the cable and te try. biggrin.gif noexpression.gif

jagabo
Member


Joined: 09 Dec 2005
Location: none
Post Posted: Feb 19, 2008 17:35 Posts Comp View users profile Send private message Reply with quote
1234567 wrote:
Ok, tell me. Why my LCD monitor, is getting the signal form my PC, from DVI PC output, and the LCD TV is not geeting the signal from the same PC?

I don't know but it has NOTHING to do with single link vs dual link DVI->HDMI cabling. Maybe you just have a bad cable?

Try using the HDTV as your main display. Turn off the TV, connect the HDTV to the first DVI output (the one that is currently connected to your monitor), turn on the TV, then turn on the computer. The computer should detect the TV and use it.

1234567
Member


Joined: 08 Jun 2006
Location: usa
Post Posted: Feb 19, 2008 18:32 Posts Comp View users profile Send private message Reply with quote
jagabo wrote:
1234567 wrote:
Ok, tell me. Why my LCD monitor, is getting the signal form my PC, from DVI PC output, and the LCD TV is not geeting the signal from the same PC?

I don't know but it has NOTHING to do with single link vs dual link DVI->HDMI cabling. Maybe you just have a bad cable?

Try using the HDTV as your main display. Turn off the TV, connect the HDTV to the first DVI output (the one that is currently connected to your monitor), turn on the TV, then turn on the computer. The computer should detect the TV and use it.


This the DVI pichture



From cable that I got before, are mising 9 pins from central (blu part) part of the block, that means less data. See the difference beetwen, the 3rd and 4rth types of DVI from this videolink





So probably the type of DVI output cable, that means the number of pins, are causing this problem. I will go to get the cable, to see that if is gona help me wink.gif

jagabo
Member


Joined: 09 Dec 2005
Location: none
Post Posted: Feb 19, 2008 19:18 Posts Comp View users profile Send private message Reply with quote
You mean six pins are missing. But even if you get a dual link DVI->HDMI cable those six pins will not be connected to anything at the HDMI end.

1234567
Member


Joined: 08 Jun 2006
Location: usa
Post Posted: Feb 19, 2008 19:37 Posts Comp View users profile Send private message Reply with quote
jagabo wrote:
You mean six pins are missing. But even if you get a dual link DVI->HDMI cable those six pins will not be connected to anything at the HDMI end.


6 pins, are digital data pins wink.gif

jagabo
Member


Joined: 09 Dec 2005
Location: none
Post Posted: Feb 19, 2008 20:28 Posts Comp View users profile Send private message Reply with quote
Which have no use on a 19 pin HDMI connector. There will be no wires from those six pins on the DVI connector to the HDMI connector. There is nothing to connect them to. There are no equivalent data pins on the HDMI end.

DVI pintouts:
Pin Signal Description
1 T.M.D.S DATA 2-
2 T.M.D.S DATA 2+
3 T.M.D.S DATA 2/4 SHIELD
4 T.M.D.S DATA 4-
5 T.M.D.S DATA 4+
6 DDC CLOCK
7 DDC DATA
8 ANALOG VERT. SYNC
9 T.M.D.S DATA 1-
10 T.M.D.S DATA 1+
11 T.M.D.S DATA 1/3 SHIELD
12 T.M.D.S DATA 3-
13 T.M.D.S DATA 3+
14 +5V POWER
15 GND
16 HOT PLUG DETECT
17 T.M.D.S DATA 0-
18 T.M.D.S DATA 0+
19 T.M.D.S DATA 0/5 SHIELD
20 T.M.D.S DATA 5-
21 T.M.D.S DATA 5+
22 T.M.D.S CLOCK SHIELD
23 T.M.D.S CLOCK+
24 T.M.D.S CLOCK-
C1 ANALOG RED
C2 ANALOG GREEN
C3 ANALOG BLUE
C4 ANALOG HORZ SYNC
C5 ANALOG GROUND

HDMI pinouts
Pin Signal Description
1 TMDS Data2+
2 TMDS Data2 Shield
3 TMDS Data2–
4 TMDS Data1+
5 TMDS Data1 Shield
6 TMDS Data1–
7 TMDS Data0+
8 TMDS Data0 Shield
9 TMDS Data0–
10 TMDS Clock+
11 TMDS Clock Shield
12 TMDS Clock–
13 CEC
14 Reserved N.C. on device
15 SCL
16 SDA
17 DDC/CEC Ground
18 +5 V Power
19 Hot Plug Detect

There is nowhere to send DATA3, DATA4, and DATA5. They are of no use in the 19 pin type A HDMI connection.

I give up.

1234567
Member


Joined: 08 Jun 2006
Location: usa
Post Posted: Feb 20, 2008 13:43 Posts Comp View users profile Send private message Reply with quote
jagabo wrote:
Which have no use on a 19 pin HDMI connector. There will be no wires from those six pins on the DVI connector to the HDMI connector. There is nothing to connect them to. There are no equivalent data pins on the HDMI end.

DVI pintouts:
Pin Signal Description
1 T.M.D.S DATA 2-
2 T.M.D.S DATA 2+
3 T.M.D.S DATA 2/4 SHIELD
4 T.M.D.S DATA 4-
5 T.M.D.S DATA 4+
6 DDC CLOCK
7 DDC DATA
8 ANALOG VERT. SYNC
9 T.M.D.S DATA 1-
10 T.M.D.S DATA 1+
11 T.M.D.S DATA 1/3 SHIELD
12 T.M.D.S DATA 3-
13 T.M.D.S DATA 3+
14 +5V POWER
15 GND
16 HOT PLUG DETECT
17 T.M.D.S DATA 0-
18 T.M.D.S DATA 0+
19 T.M.D.S DATA 0/5 SHIELD
20 T.M.D.S DATA 5-
21 T.M.D.S DATA 5+
22 T.M.D.S CLOCK SHIELD
23 T.M.D.S CLOCK+
24 T.M.D.S CLOCK-
C1 ANALOG RED
C2 ANALOG GREEN
C3 ANALOG BLUE
C4 ANALOG HORZ SYNC
C5 ANALOG GROUND

HDMI pinouts
Pin Signal Description
1 TMDS Data2+
2 TMDS Data2 Shield
3 TMDS Data2–
4 TMDS Data1+
5 TMDS Data1 Shield
6 TMDS Data1–
7 TMDS Data0+
8 TMDS Data0 Shield
9 TMDS Data0–
10 TMDS Clock+
11 TMDS Clock Shield
12 TMDS Clock–
13 CEC
14 Reserved N.C. on device
15 SCL
16 SDA
17 DDC/CEC Ground
18 +5 V Power
19 Hot Plug Detect

There is nowhere to send DATA3, DATA4, and DATA5. They are of no use in the 19 pin type A HDMI connection.

I give up.


No my friend. Is not problem of the pins etc. etc. I got the new cable, double link, and I got the same result. No signal from Pc to my TV!!! The customer service of Samsung told me on te phone, that the problem is connected with the video resolution. The cable HDMI-DVI, and can send the signal. Something with the resolution. See that page...

http://www.engadgethd.com/2006/02/08/how-to-connect-your-pc-to-your-hdtv/

edDV
Member


Joined: 06 Mar 2004
Location: Northern California, USA
Post Posted: Feb 20, 2008 13:57 Posts Comp View users profile Send private message Reply with quote
I think your problem is in your display card settings.

Regardless, you have a second option using your DVI-I to VGA adapter and a VGA cable to the 4661 PC port. The page I gave you in the manual tells you how to set both ports and the resolutions the PC display card must send.
The 4661F will allow 1920x1080p over either cable.

DVI-I to VGA adapter. Your adapter may have more pins on the DVI-I end but only the pins shown are connected for VGA.

_________________
Recommends: Kiva.org - Loans that change lives.
http://www.kiva.org/about