HDMI TV output displays little white dots

[Merkyworks]

So I purchased the Kanex MD port to HDMI cable so that I can watch nteflix on my TV. When I plug it in everything is fine but I am getting these little white dots that scroll/show up on the entire TV screen, they are about a single pixel in size. I have tried different resolution settings and this has not changed anything.

my specs are.

1. 2011 MBP 15" 2.0 w/ ATI HD 6490M, TV screen output is set to 1080p

2. Samsung 50" plasma 720p, product info http://www.samsung.com/us/video/tvs/PN50C450B1DXZA-features

3. Kanex MD port to HDMI cable http://store.apple.com/us/product/H4637ZM/A?fnode=MTY1NDA3Ng&mco=MjA4NjU2MjY


any thoughts to what could be causing this?

 

[awer25]

Try different source material (if you haven't already) like a DVD.

If not that, try a different cable. Monoprice.com has some quality ones for a few dollars.

 

[Merkyworks]

well my u-verse box is normally plugged into the hdmi port that im plugging my MBP into and I have never experienced this issue before so im ruling out the hdmi port or the TV as the problem. so that leaves either the laptop of the cable. i guess ill try the cable on another TV and see if it does the same thing.

 

[awer25]

well my u-verse box is normally plugged into the hdmi port that im plugging my MBP into and I have never experienced this issue before so im ruling out the hdmi port or the TV as the problem. so that leaves either the laptop of the cable. i guess ill try the cable on another TV and see if it does the same thing.

Have you plugged the u-verse box back in to see if the problem goes away?

 

[Merkyworks]

yes, I have been going back and forth and when viewing video from the u-verse box there are no bots.

 

[Merkyworks]

ok so when I got home I hooked my MBP to another TV that I have and I do not see any white dots, so that rules out the cable and the comp. I read a post on the ATV forum about this but it seems the problem was due to processor issues.

any reason why my samsung TV is making this happen?

 

[Merkyworks]

I'm posting this for any future searches.

I figured out that by having the resolution set to 1080p I get the little white dots but if i set the resolution to 1080i or lower I get a perfect picture. I guess it has something to do with the TV only being 720p.

 

[awer25]

I'm posting this for any future searches.

I figured out that by having the resolution set to 1080p I get the little white dots but if i set the resolution to 1080i or lower I get a perfect picture. I guess it has something to do with the TV only being 720p.

That was my first guess, but in your OP you said:

I have tried different resolution settings and this has not changed anything.

 

[snaky69]

I'm posting this for any future searches.

I figured out that by having the resolution set to 1080p I get the little white dots but if i set the resolution to 1080i or lower I get a perfect picture. I guess it has something to do with the TV only being 720p.

You were trying to display a lot more pixels than what you TV has, of course it came out funky, you're lucky something showed up on the screen at all.

A 720P TV can only display 720P or lower. 1080i might work.

 

[Merkyworks]

That was my first guess, but in your OP you said:

your right i did say that, i guess brain farted or something. obviously there is a big difference in the resolution between 720p and 1080i and it really is noticeable when displayed on the TV screen. The white dots are obviously tied to the type of signal 1080p Vs 1080i. Progressive signals send the entire frame at once whereas the interlaced signal is sent in two intervals, that and the fact that the TV is only 720p must be the reason.