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-   -   PC to HDTV issues ... (https://www.highdefforum.com/computers-htpcs/2758-pc-hdtv-issues.html)

CCH 02-26-2008 05:44 PM

Wow, thanks for your swift and most helpful reply! I have been looking at video cards for days and have been overwhelmed with the wide range of offerings, especially not knowing for certain that I really needed one. It feels good to now have a definitive answer and the card you suggest looks like it addresses my follow-up questions regarding High Def material. Most appreciative. What a wonderful resource this forum is!

Alexus 02-28-2008 10:15 PM

Hi, I'm currently running a Dell Inspiron 1720 with an 8600M GT, trying to connect to a Panasonic TX-26LXD70A via VGA.

When I first set the connection up, my laptop was able to detect the Panasonic perfectly and I had crisp display on both the TV and PC monitor. On subsequent startups, though, I am unable to get any kind of image on the Panasonic, even after changing resolutions to 800x600, 1024x768, and 1280x800.

What's worse is, when I change my display to these lower resolutions while the TV is connected, the PC Monitor ceases to display any image as well.

Also, another anomaly I've noticed is that when I run at 1440x900 while the TV is connected, cursor movement becomes noticeably laggy, as does opening new windows etc. Occasionally, I also get faded double images of the cursor which then disappear. It's like the display adapter thinks the image that is being shown on my laptop is being displayed on my Panasonic

The only problem I can come up with is that my display adapter is somehow getting the two monitors confused, and thus is unable to display a proper image/any image at all on my laptop at times, not to mention the Panasonic.

Any suggestions? I'm out of ideas to try.

Edit: My 8600's refresh rate is set to 60Hz, by the way. Additionally, while I haven't had any luck producing an image on the Panasonic since the initial connection, it has still responded to being connected to the PC (ie it registers the computer's H-freq and V-freq when the connection is active).

Alexus 02-28-2008 10:50 PM

Addendum to above post: I've also got an RCA cable with 3.5mm mini-jack set up between the PC and TV, and sound being output from the PC comes through fine on the Panasonic's speakers, so audio is fine. Finally, for what it's worth, I'm using Vista Home Premium, with the latest updates installed just a couple days ago (this includes an update for the 8600M GT, but I don't think it's linked to my display problem, as I think I encountered the problem before applying the update).

dantruon 02-29-2008 05:46 AM

I used the HDMI cable to connect from my HP laptop to my LG HDTV and everything is perfect until i load some HD video and then the tearing on the HDTV start and it was unbearable, does anyone know why? So i try to use the VGA cable but there are no signal to the HDTV. Can anyone suggest a solution because i want to enjoy Planet Earth HD without the tearing.

My laptop is the Hp Pavillion 6500 Special Edition and im using Windows Vista Home Premium.

rbinck 02-29-2008 08:48 AM

Quote:

Originally Posted by Alexus (Post 546213)
Addendum to above post: I've also got an RCA cable with 3.5mm mini-jack set up between the PC and TV, and sound being output from the PC comes through fine on the Panasonic's speakers, so audio is fine. Finally, for what it's worth, I'm using Vista Home Premium, with the latest updates installed just a couple days ago (this includes an update for the 8600M GT, but I don't think it's linked to my display problem, as I think I encountered the problem before applying the update).

If it was the video driver that you updated, you might try rolling back to the previous driver.

Alexus 02-29-2008 09:24 AM

Well, what do you know -- the rollback actually worked. Thanks alot for your help!

rbinck 02-29-2008 02:28 PM

Quote:

Originally Posted by Alexus (Post 546457)
Well, what do you know -- the rollback actually worked. Thanks alot for your help!

There have been a lot of similar issues with the 6600 and 8500 cards lately, so I guess we can add 8600 to the list. I thought upgrades were supposed to fix stuff!

CarlDV 03-09-2008 10:19 PM

Hi, everyone. This sounds like the place to be to get some professional answers. Reading the posts, it sounds like you guys know what you're talking about.
My question is this: What is the most practical way to connect my Gateway PC to my Westinghouse 37" LCD monitor? I also have an Onkyo A/V receiver. Should I use it for the above or bypass it? The specs are as follows:

-Gateway Desktop Media Center PC-GT5224 with dual core processors and 1 Gb of RAM.
-7.1 Intel Hi Def sound card, but it isn't working so I must replace it, and I'll replace it with the connectors you recomend.
-Intel Graphics media Accelerator.
Connectors available: S/PDIF socket
-(I'm not sure if the sound and video cards are integrated into the motherboard or not, but there are still 3 open bays.

Westinghouse LVM-37w3 LCD monitor (no tuner, but I get my HDTV from a satellite tuner/DVR. 1080p capable. Connectors still open:
-15 pin VGA
-3.5 mini-jack VGA audio in
-DVI1&2 (HDCP) w/Audio Left & Right

Onkyo A/V receiver HT-R550-Connectors still open:
-HDMI In (Switchable HDMI out)
-2 Digital Coax In

Do you see some possibilities here? I hope you will reply and give me some solutions. Thanks.

DMoogle 03-26-2008 12:06 AM

I recently got my first HDTV (Panasonic TH-42PZ700U, 42" plasma, go here for specs: reviews.cnet.co m/flat-panel-tvs/panasonic-th-42pz700u/4507-6482_7-32466828.html?tag=sub ) and I'd like to connect it to my computer and get the most out of it. My video card is an NVIDIA GeForce 6200 A-LE (here for specs: reviews.cnet.co m/graphics-cards/evga-e-geforce-6200/4507-8902_7-31968320.html?tag=sub ), and my Dell 2007FP monitor is currently connected to it through the DVI port (my TV doesn't have a DVI input anyway, but it does have an HDMI input).

Right now I have my TV connected to my computer with a VGA cable and configured it using the NVIDIA Control Panel wizard for multiple monitors (the drivers are up to date), but it will only let me set it to one of three resolutions: 800x600, 1024x768, and 1280x1024. My TV supports up to 1920x1080, my video card supports up to 2048x1536 (my monitor is set at 1600x1200). What do I need to do to set the resolution to 1920x1080?

EDIT: Sorry I had to split up the links, need at least five posts to post URLs. Please put them back together if you need to know the specs :)

DMoogle 03-26-2008 02:41 PM

Never mind, found out why it won't go higher.

arvindkolhar 04-04-2008 08:20 AM

Hi,

I am new here and I think I am at the right place for this question. I have read in this post about having issues connecting your PC to your TV. That turned out to be the easy part for me. I have GeForce 6200 with DVI out connected to my Aquos LC46D64U through a DVI-HDMI cable. I have noticed that everytime I connect my PC (either through DVI or Analog) my cable input has horizontal lines moving from the bottom of the screen to the top(when I try watching TV on a different input). This has happened with another PC that I tried hooking up with the TV (though just Analog on the other one). I am going to try the same with a friends laptop to see what happens while watching cable. My cable input is currently on component but I will try HDMI this weekend and post the results here. Till then have any of you had such issues with your HDTV? Is there a way to fix it? Through firmware update or other options?

Thanks for looking and the help
Arvind

Zombot 04-11-2008 06:59 AM

Grainy picture on Samsung LE23R71B over HDMI
 
Hi everyone,

I can’t get a decent picture on my LCD TV Samsung LE23R71B with my HTPC (Gigabyte GA-MA69GM-S2H with integrated Radeon X1250, Athlon X2 4200+, 2GB RAM). First I tried a common VGA cable but the picture was really poor and I couldn’t even get a suitable resolution. HDMI was better and with 1280x720 the resolution was quite satisfying. However the picture was still very grainy and almost all colors looked awful. Google told me to try composite but the result was even worse than with VGA – low resolution, grainy picture and terrible colors. Now I am back with HDMI and I have installed the latest Catalyst drivers. Playing around with various settings in the ATI Control Center slightly improved the picture, but it is still very grainy and has terrible colors. The only thing I haven’t tried is S-Video since I only have an S-Video>SCART cable and with it the TV picture was way worse than with HDMI. Please tell me what I am doing wrong.

Nikopol 04-11-2008 07:15 AM

Hi Zombot, welcome to HDF! :hithere:

Stick with the HDMI connection. It is the best for your purpose.

Your display seems to have a pixel resolution of 1366 x 768, so setting the htpc to 720p is ok for now. (If you could get 1:1 pixel mapping to work, it would be even better, but stick with 720p for now)

What kind of media are you trying to play back (DVD? Blu-ray/HD DVD? "internet movies"?)

What software are you using for playback?

Heavy grain can be part of the movie. Have you tried several movies?

Can you describe what you mean with the colors being terrible? Are they washed out or looking unnatural or is it something else?

rbinck 04-11-2008 09:49 AM

A lot of the fixed pixel HDTVs will add approximately 5% overscan to the incoming signal to push the edges of the picture beyond the display limits. Many of the newer sets have a feature to turn the overscan off especially for computer applications.

The problem with overscan is it is added by use of the sets scaler. In your case the 1280x720 input signal is not just scaled to 1366x768, but something even larger, say about 1400x800 and then the center 1366x768 area is what winds up on your screen. Definitely not 1:1 pixel ratio. That is what causes the fuzzy text and blurry picture. Normally this won't have anything to do with the color or other elements of the picture though.

HDTVs that are only expecting a HDTV video source at their inputs are problematic to hook up to a computer and many people use powerstrip to fiddle with the resolution and timing to set up a resolution within a resolution so the resulting image sent to the HDTV ends up at a 1:1 pixel resolution. nVIDIA drivers had the ability to set this also, but as far as I know ATI never has. powerstrip set up is very tricky and is not possible for me to tell you how to set it up for your HDTV, unfortunately, as it takes trial and error.

That's why I stress to our customers that if you are going to use your HDTV with a PC, be sure to get one that plays nice with a PC.

There is not any technical reason why your PC (VGA) input should not look just as good as your HDMI input assuming the HDTV is calibrated properly and you have a decent video card. The only possible variance would be the resolutions supported could be different on the VGA input. If the colors are different, then the white balance is probably not calibrated to near 6500k for the VGA input.

I don't have any specific thing to tell you to try, but hopefully this will give you some areas to look into.

Zombot 04-11-2008 07:48 PM

Thanks for the quick replies.

Most of my testing has been in the Vista GUI and I have tried some regular DVDs of Yes Minister with Media Player Classic and Windows Media Player 11. The issues certainly don’t come with the DVD.

I will try to take some photos of the screen since it is quite difficult to describe the picture. However I would say that the picture is unnatural and with a lot of green noise that degrades the colors, especially black. Sometimes it helps to change the Picture Standard in the TV menu from “Dynamic” to “Standard” or vice versa, but the result is never really flawless and the unnatural colors remain almost the same.

As for the overscan, I have tried all the available resolutions and 1280x720 is definitely the best resolution I can get since it is the only suitable resolution that comes with 60Hz. All higher resolutions only allow 30Hz and that is a serious problem. 1366x768 would be perfect but my graphic card doesn’t allow that for some reason. I hope that a new driver will fix that.

Although I haven’t found a solution, today I experienced that the picture was for a moment suddenly perfectly crisp and with good colors. It happened all by itself just after I finished installing MS Office 2007 and several minutes later all the problems have returned. Is it possible that the problem isn’t in the PC but in the TV? Or can it be caused by interference of some sort?


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