Hi, I have a SVT150 that is mounted in a pub (and has been for a number of years), however over the last 2-3 months the picture has got increasingly darker and it's now got to the point where it is barely visible (contrast & brightness are at max). Convergance has gone extremely bad also. I was wondering if this means that the tubes have burnt out and therefore the unit has had its day, or would it perhaps be a PSU problem that might be repairable? It does seem odd to me that it went so rapidly into decline which makes me think that it may not be the tubes. Any advice would be welcome! cheers, aled.