Checking a new LCD display [HOW?]

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gordom

n00b
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Jun 29, 2008
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Hi everyone.
I'm going to pick-up my new LCD display this week. The vendor allows me to replace the display if any dead pixel or any other malfunction occurs within 7 days.
Could you please advise me what kind of test should I perform at home to “provoke” any possible faults. I've heard that some failures might occur after several days of usage. Is it possible to strain the display in such way that this time will be shorter?
Thanks in advance. Regards,

gordom
 
cybereality said:
If there are dead pixels you will notice right away, don't worry.
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With no doubt I'll notice pixels that are already dead ;). I'm not worry about it. But I would like to be sure that none of these pixels, that are OK right now, won't be dead shortly. That's why I would like to strain the display somehow.
 
It doesn't really work that way. I have never had a panel that "developed" dead pixels over its life. Either its dead or alive; and there is nothing in a weeks worth of stress testing that is going to force otherwise.

If you *really* want to stress test it, put it in a hot room and run it 24x7. Heat is the monitor's natural enemy and they love to get warm fast.
 
Get yourself a program called Dead Pixel Buddy.

Run the monitor for half an hour to an hour as you normally would use it. Then run Dead Pixel buddy. Turn off the lights and/or close the shades.

Use DPB and run through all the colors. Black, White, Red, Green, Blue. As you run through red, green and blue, take a moment and look closely at the screen. Look for any black dots for each color. If you have/see none, that means you have no dead pixels or sub-pixels. A sub-pixel is the red, green, or blue pixel that together make a full pixel.

Then check black. You are looking for any "hot" or "stuck" pixels that are lit pixels against a black background. If you see none, sit back a minute looking at the black screen. If you see any lighter areas near the corners or sides, this is backlight bleed. Sometimes it shows up as a slight blue tinged area that is brighter. If it's too bright for you, the BLB is too much. If you are ok with it, then you should be happy.

Then lastly check white. When you are looking at white, you are trying to find any pixels that look purple, teal, or yellow. If there are none, your monitor is in good shape.

Try this again one day later. I have rarely seen an issue happen after a day or two, unless the monitor was impacted or severely jolted.

If you want to strain the display later, you can get DPB to cycle through the colors at 1 second intervals. This usually works pretty well unless your computer goes to power save mode, so you can turn that off.

Otherwise to strain the display, play some games on it with lots of fast movements.

Good luck,

10e
 
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