Help! Funny little red dots/lines on HDTV - AVS Forum
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post #1 of 7 Old 11-06-2012, 07:03 AM - Thread Starter
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Anybody seen this before? I recently built a new HTPC and everything was working perfectly at first. Then on XBMC I started getting random red pixelation on screen during playback (not in XBMC menus etc). Now its starting to happen in WMC as well but only in TV so far, not in Media Browser. I've googled the issue and it seems others have had it with PS3.

Hardware is as follows:

HTPC:
- Intel G630
- Asrock H77M

Receiver:
- Onkyo TX NR509

TV:
LG 55LM7600

Thanks!
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post #2 of 7 Old 11-06-2012, 07:37 AM
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Chicken pox?
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post #3 of 7 Old 11-06-2012, 07:38 AM
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Without actually seeing what's happening, it sounds like your GPU is overheating.
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post #4 of 7 Old 11-06-2012, 08:01 AM - Thread Starter
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If thats the case it would be strange as its just the onboard G630 which runs pretty cool. Also the box itself is in the basement and is well ventilated. I'll have a look at the temps under load though.
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post #5 of 7 Old 11-06-2012, 03:25 PM
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Is that a Plasma TV? I've seen that on Plasma TVs when they are starting to go bad/drift out of alignment/something.

Quality Assurance Manager, Ceton Corporation
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post #6 of 7 Old 11-06-2012, 05:19 PM
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Red pixels can be a sign of a bad HDMI cable. How long is your cable? Have another to try?

Is HDMi going through the receiver? If so, try direct to TV.
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post #7 of 7 Old 11-07-2012, 08:41 AM - Thread Starter
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OK I think I figured out the problem. It is a LCD tv and other inputs didn't have any pixelation so it was indeed an HDMI issue. I use a monoprice HDMI over Cat5e extender between the receiver and the TV. The receiver unit of this device was overheating as it had fallen against the back of the TV. Re-mounting it against the cooler wall seems to have eliminated the pixelation.
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