[geeks] LCDs

[Matty]

I think I am going to buy my LCD from CompUSA when the model I
want goes onsale. For an extra $100, they will provide a no
questions asked replacement policy for two years. In addition, 
the sales rep  said they will replace a display with a single bad 
pixel. $100 is a lot of money, but when you are spending a grand on an
LCD, it seems to be worth it.

On Tue, 2002-12-17 at 09:49, Andrew Weiss wrote:
> Trust me they won't.  Third-party Apple Authorized Resellers and Service
> providers have no financial incentive to do so.  The margin on the machines
> is so low that they don't care if they lose the odd customer since Apple
> will decline such a repair for warranty reimbursement.  You can always try,
> but I believe the repair will end your AppleCare coverage.  The LCD exchange
> prices on that model are much lower than they used to be on Powerbooks...
> that's all I can say.
> 
> >From the Knowledge Base:
> 
> "Many Apple products use active-matrix LCD panels, including the iMac (Flat
> Panel), iBook, some PowerBook computers, and Apple Cinema displays. In
> addition to being slim and light, active-matrix LCD technology provides
> customers with many visual performance advantages when compared to
> traditional cathode-ray tube- (CRT) based displays, such as increased
> brightness, sharpness, and contrast ratio.
> 
> Active-matrix LCD technology uses rows and columns of addressable locations
> (pixels) that render text and images on screen. Each pixel location has
> three separate subpixels (red, green and blue) that allow the image to be
> rendered in full color. Each subpixel has a corresponding transistor
> responsible for turning the subpixel on or off.
> 
> There are typically millions of these subpixels on a LCD display. For
> example, the LCD panel used in the Apple Cinema HD display is made up of 2.3
> million pixels and 6.9 million red, green, and blue subpixels. Occasionally,
> a transistor does not work perfectly, which may result in the affected
> subpixel being turned on (bright) or turned off (dark). With the millions of
> subpixels on a display, it is quite possible to have a low number of faulty
> transistors on an LCD. Therefore, a certain number of subpixel anomalies is
> considered acceptable. Rejecting all but perfect LCD panels would
> significantly increase the retail price for products using LCD displays.
> These factors apply to all manufacturers using LCD technology--not just
> Apple products.
> 
> If you suspect your display contains a high number of pixel anomalies, take
> your Apple product to an Apple Authorized Service Provider for closer
> examination. There may be a charge for the evaluation"
> 
> ----- Original Message -----
> From: "Joshua D Boyd" <jdboyd at cs.millersville.edu>
> To: <geeks at sunhelp.org>
> Sent: Tuesday, December 17, 2002 9:27 AM
> Subject: Re: [geeks] LCDs
> 
> 
> > On Tue, Dec 17, 2002 at 08:07:24AM -0600, Bill Bradford wrote:
> > > > On my
> > > > machine there appears to be one pixel that's always blue, is that
> > > > something fixable, or should I return my machine for a replacement?
> > >
> > > No - they allow a certain number (up to six?) bad pixels; over that,
> they'll
> > > replace it.
> >
> > Take it back and complain.  They might replace it anyway.  Especially if
> > the bad pixel is prominantly placed instead of at the edge.
> >
> > --
> > Joshua D. Boyd
> > _______________________________________________
> > GEEKS:  http://www.sunhelp.org/mailman/listinfo/geeks
> _______________________________________________
> GEEKS:  http://www.sunhelp.org/mailman/listinfo/geeks
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