[RFI] computer screen rfi

[Kostas SV1DPI]

Hello to all and Merry Christmas

We have a problem in my club's station. When I turn on the computer's 
screen everything is ok in our Kenwood 950. When I run VE7CC's cluster 
program I can see 3 s-units noise. I thought that it was because of the 
white colour but this does not happen if I open painting which has also 
a white colour as background. Any ideas where is the problem?

...73 de Kostas SV1DPI
   (One of SZ1A-EP6T)