Sylvia Else wrote:
http://tinyurl.com/yz3eko4

How does a CRT end up with a vertical line of dead pixels?

It doesn't. : I suspect there are *two* "lines of dead
pixels" in this CRT -- though only one is probably visible
(luck?).

There are two (3?) wires that cross the screen (usually horizontally
but since this is a wider aspect ratio screen, they might be
oriented vertically) used to stabilize the aperture grill.