Thanks to both of you. I guess I'll take the board out and let it dry for another day before I try something else.

I also think so, but the only magnet it ever came into touch with was my screwdriver. What sucks is that I can't degauss it, because I neither have a strong magnet, nor can I degauss it through the menue (because I can't read it, duh)

Hey community, I bought a cheap CRT (that was working) and cleaned it with an all-purpose cleaner and a water hose (very low pressure). After I let a fan fry it for a day I reassembled it and now I have no picture other than "polar lights" anymore. My only theory was that all the dust I was washing …