White pixels on iPad screen

Question

Iron

The situation is this: already on the second iPad 3, handfuls of white pixels appear. They are almost imperceptible, but there are a lot of them, almost all of them are concentrated in one area of ​​the screen. Some dots are bright, some you can't distinguish without a magnifying glass.
The strangest thing is that exactly the same situation was on the previous iPad. When I took a new one from the service, I thoroughly checked everything - there were no problems. Pixels appeared after some time. If my eyesight does not fail me, they tend to disappear and move when pressing on the touchscreen.
There are 2 options here:
1. The stars developed in such a way that a device with a very rare defect fell into my hands twice in a row (I did not find people with a similar problem on the Internet).
2. Blame the USB cable with a bare area without insulation. I don’t know how it can affect the display of the device, but the white pixels on the first iPad appeared exactly after the cord broke. I charge exclusively from the computer, the tablet lies on a wooden table while charging.

Tell me, what could be the problem and how can I fix the device?

Answer 1

Most likely, the matrix is ​​​​transferred in these places. Therefore, all three RGB pixels are lit - forming a white glow, since they are “short-circuited”. The matrix can be squeezed either by strong pressure on the touchscreen, or there may be a manufacturing defect in the assembly.
Or maybe both. Those. the matrix was pinched, but somehow it worked out, and with strong pressure on the touchscreen, it eventually gave up
. Maybe two ipads - a from the same batch, or one line, or released at the same time.

Answer 2

I have never seen floating dead pixels. True, I heard about “sticky” or “freezing” pixels. In my experience, image ripples are due to a bad "mass" between the controller board and the matrix - in a cable or connector. But this does not fit well with pressure on the touch.