Incredibly peculiar video issue - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 2 Old 12-18-2012, 04:30 AM - Thread Starter
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I have just gotten into this whole A/V shindig.

I have this issue with video playback and streaming from my laptop to my tv. My issue is that when video is played, there is a horizontal line scrolling down vertically. It's almost like a wave that ripples all the pixels. I have tried various controls and can't establish where it is coming from.

-This occurs with HDMI or VGA.
-Also occurs with either streamed media, discs, or downloaded video.
-Occurs on laptop battery and AC power but seems not as frequent on battery (my house is not grounded properly)
-does NOT occur with other laptops
-switching HDMI ports and cables does not matter
-switching tv outlets does not matter
-switching laptop outlets does not matter
-still occurs if using other monitors

If I just watch video on my laptop it works fine unless in full screen, then the frame rate seems to drop when the video is panning or other fast motion scenes.

I have not tried my laptop at another house yet

My setup consists of

-LG 55" LED 55lw5600
-Asus gt50 vt laptop (or something like that) with nvidia 9800 gm
-Adcom GFA 555 amplifier
-Adcom GTP 450 pre amp
-Martin Logan Aerius I speakers
-no name HDMI or acoustic research top of the line
-no name vga or monster vga

Currently they are all on the same breaker however running just the tv and laptop still gives me the problem.

My diagnosis is that my laptop graphics card is dying. I appreciate any and all thoughts. Thank you.

frustrated enthusiast
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post #2 of 2 Old 12-19-2012, 12:17 PM
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It seems you tried everything I could think of. It does seem the problem is with your graphic card, more specifically with the part that is in charge of output to external display. I don't think the fact of frame rate drop when in full screen by itself is an indication of any problems with graphic card - more like your CPU and/or graphic card is not fast enough, I sometimes have the same symptoms with my laptop.

If it is imperative for you to use this laptop for streaming you can try finding an laptop video card if you laptop has ExpressCard slot, or some other extension capabilities. I know there are also USB video cards. But I think I read somewhere that all these external video cards are slow and probably will not be good for streaming either.
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