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Unusual CRT monitor screen symptom no one has been able to recognize (yet)
grantspain:
same tube number?
chaos7:
Solved my issue. Even though my identical cabinet (inside and out) had a earth/ground wire from the chassis mounting screw to the mains power box I just unscrewed the wire in the cabinet with the issue and the problem was resolved. A bit odd but I'm not looking as to how coz it works fine now.
grantspain:
noise going through the earth, glad you fixed it