Gould DSO400. Green screen problem..

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mubase

Joined Feb 19, 2014
1
Hi. This is my first post. My name is Steve. I am an undergraduate Audio systems BSc student in my final year at London Metropolitan. I am requesting help with a Gould DSO400 digital oscilloscope. I have a problem with the screen. The scope all seems to work OK except the screen is a very bright green and there are diagonal lines from top to bottom along the x-axis..:confused: I have tried adjusting the Black trimmer and the brightness trimmer. It helps to make the text and waveform a little sharper but doesn't darken the screen. Would anyone know what causes this kind of problem?
Any help seriosly appreciated. I have included an attachment picture.
Thanks,
Steve.
 

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