My monitor shows no problems.
The operating instructions for the monitor say this :
Panel Dots (Pixels)
Due to the nature of the manufacturing of this product, approximately 1 pixel per million (1ppm) may
be brighter or darker on the LCD panel. This does not affect product performance.

Thus (4.95 million pixels) a maximum of 4 pixel errors may occur to stay within your specification.

We have 6 of them in use at the agency. Not a single one had pixel errors.

Unfortunately, I can't help either. Yours sincerely FF

No idea. We bought 3 screens of the same type. Unfortunately, one of them has a pixel error.