A purple dot on your phone screen often points to pixel or display damage, especially in OLED/AMOLED panels, caused by ...

I recently got a good deal on a HP zr24w LCD monitor from MacMall. I think it has a single dead pixel (dark) in the upper left corner. Would you try to return or exchange the monitor for this reason?

If you’ve got a TV set with unsightly lines running through it, you may not need to replace it. In fact, simply performing a quick tap dance with your fingertips might be enough to rectify the problem ...