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Thread ID: 93847 2008-10-03 02:11:00 External LCD started showing red dot/line artifacts dyewitness (9398) Press F1
Post ID Timestamp Content User
709451 2008-10-03 02:11:00 See the screenshot:
www.imagef1.net.nz

I have an LCD monitor connected to my laptop, and the last few days it's started having these red dot/lines, sometimes different colour, like cyan.

On a dark background, they show up as red, on a light background they show up as cyan.

Happens most often when clicking the Start Menu in Windows, where part of the menu are left behind as these dots/lines.

Other info:
- Samsung syncmaster 226bw monitor (maybe 6+ months old)
- Toshiba Tecra M5 laptop, Windows XP Pro (2+ years old)
- external LCD connected to laptop via VGA port

So, is monitor on the way out? or display card in the laptop? or something else?

Thanks. 		dyewitness (9398)
709452 2008-10-03 02:14:00 Maybe it is your monitor because, all I can see in your screenshot is a black screen.
:) 		Trev (427)
709453 2008-10-03 02:21:00 Maybe it is your monitor because, all I can see in your screenshot is a black screen.
:)

I'm just on another machine now, if you look carefully at the image, 3/4 across from the left is a thin verticle red line. 		dyewitness (9398)
709454 2008-10-03 02:42:00 Maybe Trev's been blinded by using Nortons on his PC. I can see the lines. :p

JK Trev. :D

So it's only on the external monitor that this is happening, not the built in screen? 		wratterus (105)
709455 2008-10-03 02:54:00 Maybe Trev's been blinded by using Nortons on his PC. I can see the lines. :p

JK Trev. :D

So it's only on the external monitor that this is happening, not the built in screen?

Ok tests I've tried so far:

- different laptop connecting to external monitor: no problem

- went back to original laptop, set the external LCD as primary and single display (ie no display on laptop monitor): no problem

- set the laptops monitor as single and primary display (ie no display on extertnal LCD): no problem

- went back to dual screen, external LCD as primary, laptop monitor as secondary: red dots/line problem

Hmmm.... 		dyewitness (9398)
709456 2008-10-03 03:00:00 Maybe it is your monitor because, all I can see in your screenshot is a black screen.
:)

Ok here's a better screenshot:
www.imagef1.net.nz

The lines are "leftovers" from clicking the Start Menu. 		dyewitness (9398)
709457 2008-10-03 03:01:00 Can you try a different monitor on the laptop, or try a 'normal' resolution such as 1024*768 on the external monitor? wratterus (105)
709458 2008-10-03 03:07:00 Can you try a different monitor on the laptop, or try a 'normal' resolution such as 1024*768 on the external monitor?

Just tried a different resolution on external monitor, still has dots/lines.

Will try another monitor... 		dyewitness (9398)
709459 2008-10-03 03:19:00 Yes happens on another monitor too... dyewitness (9398)
709460 2008-10-03 03:21:00 Hmm. Often you get those kind of lines on a screen when a graphics card is overheating or the graphics memory is faulty.

Does the lappy have build in graphics (Intel or whatever) or is it running a branded card? If you're unsure have a look in the device manager.

I'd run a RAM test, although that isn't likely to find any faults, it can't hurt to be sure. 		wratterus (105)
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