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General discussion

LN40A650 Sound and resolution questions

Mar 31, 2009 1:10AM PDT

I bought the LN40A650 for use as a computer monitor, and have been quite pleased so far with it, however i have a few issues

I have it plugged into the HDMI / DVI port #2 using an HDMI cable hooked to a DVI to HDMI converter on the PC and i have a component stereo cable to standard headphone jack cable hooked into the PCs sound card - an onboard sound card, the video card is a BFG nvidia GTX280

Firstly the sound isn't working on that input, i verified that the cable is good using the side inputs and an ipod and the sound card is good using headphones - but every few hours i will hear a crackle from the speakers

Secondly i have not been able to get the 120hz true motion to work with the hdmi/DVI connection on port 2 - i like my games to look very high resolution, and port 2 is the only one that seems to provide 1-1 pixel mapping and crystal clear text, if i plug it into hdmi port 1, i get the 120hz effect, but things are scaled and i cant get the super clear text i could with port 2

i dont so much care about the sound as i want to get a good sound system anyway, but i would really like to be able to get the clear 1-1 pixel mapping without any bleed that i get with port 2 to use 120hz conversion, so what resolutions or scaling settings do i need to use?

Discussion is locked

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LN40A650 Sound and resolution questions
Apr 1, 2009 5:22AM PDT

ppinard,

I might suggest making sure your drivers are updated. Are they, or is a new version available? If so, many of these issues may be corrected.

The resolution is fixable with the television. I suggest you use the Just Scan feature on your HDMI input, and rename your inputs to PC. It will change the scaling. You should also be able to use AutoMotion Plus technology by doing that as well, giving you a better text.

Keep me posted!

--HDTech

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Check TV settings
Apr 2, 2009 12:45AM PDT

You should be able to get 1:1 mapping and clear text on any HDMI input if you do the following:

1. Set the picture size to "Just Scan" (hit the P.size button until it appears)
2. Turn sharpness down to 0

I believe that naming the input "PC" disables AMP, which is why you can't get it working.

As for the sound, the TV is supposed to be able to autodetect whether to get sound from HDMI or the separate audio ports, but it doesn't seem to work a lot of the time. I think the issue is whether the TV thinks there's audio coming over HDMI or not.

As an aside, I believe the GTX280 is supposed to be able to pass sound over HDMI -- if your card supports it, that would probably be the easiest way to go. I don't know if it has an on-board sound chip or not (if it does, you'll just have to pick the appropriate sound device in windows, if not, you'll have to run an internal SPDIF cable from your sound card to the video card).

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worked
Apr 2, 2009 4:16AM PDT

it worked, setting it to just scan got the resolution set right, i dont think i can get sound over the HDMI as i'm using a DVI to HDMI converter

when i switched to input 1 the colors were noticeably washed out but my friend who used to work at tweeter (Joe Kaluza) got the contrast and brightness sorted out and its looking great

thanks to all