Go Back   AnandTech Forums > Hardware and Technology > Peripherals

· Hardware and Technology
· CPUs and Overclocking
· Motherboards
· Video Cards and Graphics
· AMD Video Cards
· Nvidia
· Displays
· Memory and Storage
· Power Supplies
· Cases & Cooling
· SFF, Notebooks, Pre-Built/Barebones PCs
· Networking
· Peripherals
· General Hardware
· Highly Technical
· Computer Help
· Home Theater PCs
· Consumer Electronics
· Digital and Video Cameras
· Mobile Devices & Gadgets
· Audio/Video & Home Theater
· Software
· Software for Windows
· All Things Apple
· *nix Software
· Operating Systems
· Programming
· PC Gaming
· Console Gaming
· Distributed Computing
· Security
· Social
· Off Topic
· Politics and News
· Discussion Club
· Love and Relationships
· The Garage
· Health and Fitness
· Home and Garden
· Merchandise and Shopping
· For Sale/Trade
· Hot Deals with Free Stuff/Contests
· Black Friday 2015
· Forum Issues
· Technical Forum Issues
· Personal Forum Issues
· Suggestion Box
· Moderator Resources
· Moderator Discussions

Thread Tools
Old 08-16-2012, 09:10 PM   #1
Muse's Avatar
Join Date: Jul 2001
Location: Under the rainbow over Berkeley
Posts: 16,806
Default What would cause this aberration when monitor displays photos?

One of my systems (desktop) is running a new Acer S231HL bid 23-Inch Widescreen Ultra-Slim LED/LCD monitor via the DVI input.

When I view JPG photos, either on my HD or online, I see several little dots the size of pixels. They are yellow color and some of them flash. It's as though they were stars in the night sky, you know how some twinkle and some don't? That's the way these flashing pixels behave. They aren't supposed to be that color. For instance, I have this photo on a hosting website and when I look at it I see 10-12 of these star-like pixel-sized yellow dots, most with black background, a few with blue background.

What could be causing these. I ran Dead Pixel Buddy and don't see any dead pixels with any of the background colors.

Quotations on happiness!
Muse is offline   Reply With Quote
Old 08-16-2012, 09:22 PM   #2
Throckmorton's Avatar
Join Date: Aug 2007
Location: Houston, TX
Posts: 16,837

I think it's a video card issue, or it could be a bad cable.

Try viewing with different programs, like the Windows image viewer, another browser, etc.
K&N air filter = 45x as much dirt in your engine (working link)
"It has already been proven that the concept of a "living wage" is a liberal fantasy." - Patranus
Throckmorton is offline   Reply With Quote
Old 08-17-2012, 04:11 AM   #3
Platinum Member
Join Date: Jun 2009
Posts: 2,866

Just throwing a shot out in the dark. A lot of 6 bit monitors attempt to emulate 8 bit color depth by changing a pixel color back and forth really fast. Maybe its having problems with this that a strait dead pixel check wouldn't find.
Ben90 is offline   Reply With Quote
Old 09-03-2012, 01:36 PM   #4
Muse's Avatar
Join Date: Jul 2001
Location: Under the rainbow over Berkeley
Posts: 16,806

It seems that however I looked at a JPG it had the star-sky effect, some twinkling, some not. I figured it was the monitor, maybe the video card, both ideas were put forth in this thread.

My plan in troubleshooting/identifying the problem was to switch monitors. I bought a different 23" LED/LCD display shortly after I bought the Acer in question, a Samsung S23A350H, which I had connected to my downstairs laptop. This morning, I switched the monitor placements and the Samsung shows no such yellow glowing pixels at random locations, some twinkling. The amazing thing is that with the Acer connected to my Lenovo T60 laptop, the are no aberrant yellow pixels either! So, somehow it was that monitor connected to my desktop with it's nvidia BFG6600 2x DVI video card that does this, don't know why.

In truth, I think the Samsung on the desktop is a better idea anyway, because:

1. It's way way easier to adjust
2. From the time you turn it on until you get a picture is like a second, whereas the Acer takes 12+ seconds
3. I think the Acer looks better on VGA, which is what I get out of the laptop.

It was a hassle making the switch, partly because the Samsung only has VGA and HDMI inputs, whereas the Acer also has a DVI. I bought an HDMI splitter in order to support having the Samsung as my desktop's display. Besides my desktop I have the display set up to view output from my blu-ray players.

So, I have my workaround now, don't know what the problem was...
Quotations on happiness!

Last edited by Muse; 09-03-2012 at 01:40 PM.
Muse is offline   Reply With Quote
Old 09-03-2012, 04:00 PM   #5
Golden Member
Join Date: Feb 2008
Posts: 1,818

Almost seems that you answered your own question (ie, what could cause this?).
Mainly, you are now using a different port and cable (ie, VGA) for the ACER and a different cable (DVI to HDMI) for the Samsung.

Recommend that you verify proper working of the ACER's DVI port using a DVI cable of known/verified quality. If it is just a cable issue (not likely) then fine, but if it is the ACER's DVI port you might want to consider RMA-ing it.

Last edited by C1; 09-03-2012 at 04:02 PM.
C1 is offline   Reply With Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 01:12 PM.

Powered by vBulletin® Version 3.8.8 Alpha 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.