stuck pixel on v3 571g (73614g75mai)

Gents,

A pixel is simply a 'picture element', one of a great many, which make up your screen display.

It consists of 3 sub pixels - one red, one green and one blue.

Normally, all three are switched off resulting in a black pixel.

Generally it is a single sub pixel that becomes stuck but can be any permutation of the three.

'Stuck' simply means that one or more sub pixels is permanently switched on resulting in a dot of colour being permanently present on the display.

This is generally a fault in manufacture and, if you study the data sheet for almost every LCD screen, you will find that these are to be accepted, up to a point, and do not constitute a fault.

If you have more faulty pixels, or indeed a clump of faulty (yes they cover themselves against clumps too), over that specified in the data sheet then you would be covered under guarantee.

However, I'm not sure whether you could claim under guarantee for stuck or dead pixels that appear after purchase.

(A dead pixel or sub pixel is one that, unlike a stuck pixel, never switches on at all - always black.)

Not to confuse matters further, an LED screen, I believe, has 4 sub pixels!

Leho,

Yes, I would pursue it too. If present at purchase, then I'm afraid you are stuck with it (no pun intended) assuming the faulty pixel count is within spec (another pun?). The problem, if one exists, is convincing the manufacturer that the fault was not present at time of purchase. (I was successful getting a replacement Sony monitor some years ago.)

Some people are more prone to spot them than others. It also will depend on the particular colour together with brightness. (Stuck pixels tend to be full on.) I have an old Fujitsu (which my Acer replaced) with one bad pixel (red dead, green full on, blue full on) producing full brightness cyan. You cannot miss it! Once noticed, you will always see it. My eyes are drawn to it - very distracting. My advice, don't go looking for them!

Clearly (oh dear!), having a pixel with all three sub pixels faulty is far more prominent than a solitary sub pixel.

There are a couple of methods employed to try and correct the problem.

1. Gently massage the pixel with a cocktail stick (Just don't do it - more likely to cause screen damage or kill further pixels). Some claim that applying pressure can correct the damaged circuit but I really wouldn't want to risk further damage. Besides, I believe the fault is with the transistor and no amount of pressure will revive it.

2. Use a 'pixel exerciser'. This is software that allows you to highlight the problem pixel and select a frequency of on/off cycles in an attempt to 'jump start' the pixel back to normal operation. I have tried this with no success whatsoever.

I think if you have a bad pixel there isn't really anything that can be done.

LCD panels cannot be repaired (I doubt it would be economic anyway). You are looking at a panel replacement.

As far as panel manufacture goes, I can sympathize to a degree. With a 1920 x 1080 panel incorporating > 16 million sub pixels the likelihood of a totally fault free product is surely low hence the 'get out' clause in the data sheet.

konvictgeezy,

Apologies for going on and on. As said, I agree with Leho. Do try and get the laptop you paid for! After all, Acer is a large reputable company and I doubt it would have a noticeable impact on the balance sheet. In fact it could be of benefit to Acer to demonstrate a commitment to the customer where a genuine issue exists. (I am reminded of my experience with Apple. I bought a 23" iMac that proved to be a Lemon. After three attempts to fix, Apple apologised and gave me a new 27" iMac and even carried it to my car!! Now that's customer care!)

Perhaps you could post and let us know how you get on.

From what you have said, I suspect you actually have a dead sub pixel.

Obviously it would not be detectable on a black background. It may also be difficult to detect on blue and, for some people red also. Remember that a dead or black sub pixel may well 'take on' a hue as the surrounding coloured pixels tend to fool the eye.

At a guess I would say your purple pixel is actually black. It is not actually possible for stuck pixels to display purple.

When we talk about stuck pixels, we are referring to one or more sub pixels that are 'full on'.

It follows that stuck pixels must appears as one of only 7 possible colours:

Red

Green

Blue

Yellow (both red and green stuck)

Magenta (both red and blue stuck)

Cyan (both green and blue stuck)

White (all stuck)

(Black, of course, being a dead pixel)

In reality a sub pixel can't actually get stuck on. The problem is the transistor that switches it on. It basically was either bad at manufacture or it has since gone pop and become short circuit resulting in it always passing current to the sub pixel.

(Should it go pop and become open circuit, then you have a dead pixel.)

I don't believe anything can be done to cure this.

Incidentally, if you are wondering how a pixel that can only display 8 colours (if you include black) can show > 16 million colours, we would need to understand 'duty cycle' which is really beyond what we are discussing here.

Unfortunately, none of this diatribe is helpful in offering a 'fix'. As I see it, you either live with it or convince Acer to replace the panel.

I'm afraid I don't understand your question.

It is impossible to give a definitive assessment of the problem without seeing your panel first hand.

As far as correcting the problem, the whole panel would need to be replaced as individual pixel replacement is not possible.

I honestly don't know Acer's policy on this.

You would need to speak with them (I am not employed by or associated with Acer).

However, I have seen a review of an Acer monitor that did include Acer's pixel defect policy. That stated:

'22 or more total subpixels'

'2 or more subpixels in center of screen'

Whether this is the policy that Acer applies to laptops, I don't know.

You need to ask Acer as I don't know how old the review was or whether Acer's policy has been revised.