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Windows 7: TV scrambled while PC is connected via HDMI

30 Jul 2011   #1
karelo

Windows 7 Ultimate x64
 
 
TV scrambled while PC is connected via HDMI

First of all sorry if it's not that Windows related!
So the problem is that my LCD TV has a scrambled picture when my computer is turned on and connected to the TV via HDMI. I got analog signal TV connection but the picture is fine while the PC is turned off. Yeah I know I should get digi TV but till then I would like to sort this out. The TV is a Samsung 40" LCD model LE40A336. It has 2 HDMI input ports. Tryed both with same results. BTW if I remember it right, I had the PC connected via VGA last weekend and didn't have this problem. I will double check it in the morning.
Maybe I'm using wrong setting with PC... wrong Hz or sth. Anyhow maybe someone has had similar problems and solved it.
PC:
GTX 470 DVI->HDMI
i5 2500K
Windows 7 x64
EDIT: The TV is the only monitor connected to the PC via HDMI. Sound is passing through the HDMI cable aswell.


My System SpecsSystem Spec
.

31 Jul 2011   #2
MrNeeds

Windows 7 Ultimate x64 SP1
 
 

Quote   Quote: Originally Posted by karelo View Post
First of all sorry if it's not that Windows related!
So the problem is that my LCD TV has a scrambled picture when my computer is turned on and connected to the TV via HDMI. I got analog signal TV connection but the picture is fine while the PC is turned off. Yeah I know I should get digi TV but till then I would like to sort this out. The TV is a Samsung 40" LCD model LE40A336. It has 2 HDMI input ports. Tryed both with same results. BTW if I remember it right, I had the PC connected via VGA last weekend and didn't have this problem. I will double check it in the morning.
Maybe I'm using wrong setting with PC... wrong Hz or sth. Anyhow maybe someone has had similar problems and solved it.
PC:
GTX 470 DVI->HDMI
i5 2500K
Windows 7 x64
EDIT: The TV is the only monitor connected to the PC via HDMI. Sound is passing through the HDMI cable aswell.
the VGA doesn't transfer data signals through digital technology, it uses analog, that's why the picture appears correct on the VGA, the HDMi though uses a technology called HDCP handshaking, the PC needs to handshake the display for it to show the images being encrypted from the desktop, if that handshake doesn't take place then the image will appear scrambled.

you can read up about HDCP here High-bandwidth Digital Content Protection - Wikipedia, the free encyclopedia but your options are just to use the VGA cable, or if it is a software fault then you could try and update your graphics driver as NV may have added support for your display

MrNeeds
My System SpecsSystem Spec
31 Jul 2011   #3
karelo

Windows 7 Ultimate x64
 
 

*When using an HDMI/DVI cable connection, you must use the HDMI IN 2 jack.
CHECK
*The HDMI/DVI terminal supports DVI connection to an extended device with the appropriate cable (not supplied). The difference between HDMI and DVI is that the HDMI device is smaller in size, has the HDCP (High Bandwidth Digital Copy Protection) coding feature installed, and supports
multi - channel digital audio.
CHECK

So is it driver related? I have installed the latest drivers from Nvidia homepage.
My System SpecsSystem Spec
.


31 Jul 2011   #4
jimbo45

Linux CENTOS 7 / various Windows OS'es and servers
 
 

Hi there
another issue to take note of is the wretched "DRM" when attempting to view protected copyright -- it's about time that that whole wretched mess was finally "put to bed" but that's another issue.

If your DVD player can unscramble say a Blu ray disc (legally of course) then hdmi out from the computer to HDMI in to the monitor should be fine - otherwise you won't be able to play HD content.

I don't know how XBOX HD works so I can't add anything to that part of the discussion.

Cheers
jimbo
My System SpecsSystem Spec
31 Jul 2011   #5
karelo

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by MrNeeds View Post
the VGA doesn't transfer data signals through digital technology, it uses analog, that's why the picture appears correct on the VGA, the HDMi though uses a technology called HDCP handshaking, the PC needs to handshake the display for it to show the images being encrypted from the desktop, if that handshake doesn't take place then the image will appear scrambled.
MrNeeds
So the picture of the PC should be scrambled then but in my case it's the TV souce that's scrambled. Or did I get it wrong?
Double checked the VGA connection. Scramble free. I wish i would have a second HDMI device to test with.
Jimbo, the computer is idle and showing desktop. Not shure what I wanted to let you know with that but yeah.
My System SpecsSystem Spec
31 Jul 2011   #6
karelo

Windows 7 Ultimate x64
 
 

Just checked with a Toshiba SD590 DVD player via HDMI. "The SD-590 has an HDMI connection, it up-scales standard definition DVD
content to 720p, 1080i and 1080p, giving your existing DVD collection a
near high definition appearance."
The picture was still scrambled. PC was unpluged. When I turned the player off the picture was fine again.
Will try another HDMI cable tomorrow hopefully with a laptop.
My System SpecsSystem Spec
01 Aug 2011   #7
karelo

Windows 7 Ultimate x64
 
 

SOLVED: It was the HDMI cable. Just tested with another HDMI 1.3b cable which is twize as thin and with no cold connectors but it was scramble free.
The specs of my cable:
Version: 1.3
Cable Length: 2 Meters
Color: Black
Suitable for use in PS3, Xbox 360, HDTV, DVD Players, Blu-ray Players, and much more
Supports 480i, 480p, 720p, 1080i, 1080p resolution
Transfer Digital Audio and Video signals at warp speed of 5 Gigabits per second
Designed to meet all HDMI standards
Gold-plated connectors, molded strain-relief design lessens plug/socket pressure
Gold-plated connectors for highest signal transfer rate and resistance in corrosion
Large gauge PVC jacket provides maximum shielding against wear and tear and extreme temperatures

Whats the difference between 1.3a and 1.3b?
My System SpecsSystem Spec
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 TV scrambled while PC is connected via HDMI




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