Hello, I have a monitor Nokia multigraph 446 Xpro (microemission), tube size 19" Freq. 107 Khz. - that just stopped working. Ibought it for my PC 9 years ago. what can I replace it with? It started flickering and I had a hard time keeping the image stable sometimes the screen would go off with a click. The last time, there were more and more clicks and flickers and it went black. It does not work anymore Thank you