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Computer won't detect HDTV

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Old 06-05-2008, 12:18 PM   #1
My plasma is High Def.
 

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Default Computer won't detect HDTV

Hi everyone! I am new to this forum and I would like to start by saying hi and thank you.

I have searched all over the Internet and I can not find anything about what I am going to explain. I have read many threads here and other places. Most websites point to this forum as a great source of info and know-how. Here's my set up:

Computer:
CPU: AMD Athlon 64 X2 Dual Core 4400+
Video: NVIDIA GeForce 7600 GT
Mobo: ASUS A8N-SLI
RAM: 2GB Dual Channel PC3200
OS: Windows XP Home SP2

HDTV:
AKAI LCT3285TA 32" Wide-Screen LCD TV 1080p

Most of you may not of heard of my TV brand, but it works just as well as any other TV out there and I have never had any connection or display problems with it. I am trying to connect my PC to my TV. My video hard has DVI and my TV has HDMI. I purchased a DVI to HDMI cable and hooked it up to the TV and PC. Most forums and articles I have read state that the PC should auto detect the TV in some way (it may not be the correct resolution or refresh rate) but it should detect it. I know I might have to "force" the resolution because of upscaling and refresh, but in order to do any of that I need the PC to detect the TV and it's not. I checked the TV and it says "no signal" and my PC still says only one monitor is connected (yes, I have restarted). I have also heard about making sure you DVI-out on your video card is turned on (I didn't even know you could turn it off), and I have heard about HTCP compatible video cards which sounds like it's more exclusive to hooking up a Blue-Ray player to your PC to get the full 1080p.

I have given a lot of information and my question might have been lost, so I'll type it out simply.

My computer isn't detecting my TV. Is there something I am missing? Is my video card even capable of doing this?

Thank you to anyone willing to help me.
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Old 06-05-2008, 12:37 PM   #2
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Just telling us it is a 7600 GT does not tell us what the ports are. They make them with a VGA port and a DVI port, two DVI ports and other arrangements depending on the particular card.

Try reading this: Hooking Up A PC to A HDTV there may be some info in there that will help.

You could try just hooking up the TV alone and see if that works, or hook your current monitor to the other port if your card has the 2 DVI ports.
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Old 06-05-2008, 02:14 PM   #3
My plasma is High Def.
 

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You are right, sorry about that...

It has 2 DVI-out ports and 1 S-Video-out and all they work, same with the HDMI-in port on the TV.

I am currently using a DVI (on computer) to VGA (on TV) cable, but thought about upgrading to HDMI considering I watch movies and play many games on it.

Thank you for that link it sounds like it will be very helpful. I am reading it now.

That is a great article and one of the best overall I have read. The only problem is that this is for an HDTV that has been detected by the computer. I ran and installed the MonInfo and that program only found one monitor, the CRT I have as the main. I have also used Powerstrip but it will only alter the resolution to the CRT monitor, not the HDTV.

Thank you very much for that article though, it was very insightful.

Last edited by Dexdiman; 06-05-2008 at 02:25 PM. Reason: Read the article.
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Old 06-06-2008, 02:20 AM   #4
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Have you updated the nvidia drivers?

There is a checkbox in the driver settings, something like "force tv detection". Have you tried that?
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Old 06-07-2008, 02:45 PM   #5
My plasma is High Def.
 

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Thank you Nikopol, I did find something like that in the Nvidia Control Panel and it did detect an HDTV. I keep getting "no signal" no matter what resolution I pick, but I also noticed there was a drop down menu that allowed me to pick the connection used between the computer and TV (in the Nvidia Control Panel). I also noticed that DVI was not a part of that list, only Component, S-Video, and Coax were listed. I am thinking that the PC did detect the HDTV, but thinks the TV is connected by something other than DVI?

Anybody have any ideas on that?

Thank you for all your help so far.
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Old 06-07-2008, 08:23 PM   #6
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My only suggestion would be to set your resolution to 640x480 at 60 Hz and turn the computer off. Then connect the HDTV to the port that the monitor was connected to and then reboot. Most any HDTV will operate at 640x480 @ 60 Hz. If that is successful, then you can use moninfo to find out what resolutions the TV says it will support.
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Old 06-09-2008, 05:37 PM   #7
My plasma is High Def.
 

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Shouldn't it be as simple as plugging the HDTV up to the computer and the computer at least auto detecting the TV, even if it's not the correct resolution or settings?
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Old 06-14-2008, 12:30 PM   #8
My plasma is High Def.
 

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Sorry for the double post but I couldn't edit my last message.

Thank you for all your help but I can't seem to find any answers to my problem here. I am going to move to some other forums and try and find what I need. Please have a Mod close this thread, it's not going to help anyone else.
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