what does a dead pixel look like and can it move around, or show up oncein a while?

i have these little black triangles that show up on occasion.  it only happens on boot up and then they go away withing 2 mins after boot up.

curious wabbitt

It can vary but usually it’s a little dot and it’s the wrong color. Sometimes it can be a pink or white dot on a black screen. Sometimes, it can come in and out. Supposedly, you can rub the screen gently to get some to go away.

I haven’t seen a triangle configuration before….care to share a pic?

the next time it happens i will take screen shot. 

they actually look like a tiny stealth bomber black little tirangle.

weird!