Quote:
Originally Posted by Jeffhs
It's a good thing you explained the meaning of that large dark "X" on your TV's CRT, as the mark could have otherwise been mistaken for an X-shaped ion burn, which was quite common in older rectangular b&w CRTs. (I don't know if there was such a thing as ion burn in color tubes.) However, that mark must have been made with a grease pencil if you were able to remove it as evidenced in your second picture of the TV in operation.
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Permanent marker ink is easy enough to remove from non-porous surfaces by tracing over the marks with a dry erase marker and wiping clean. This method may require more than one application of dry erase ink. I've seen permanent marker ink come off with a heck of a lot of scrubbing as well.