Re: B&O Capri 606 TV (17") restoration
the dot is normal when you power off a set with no bright raster,many of my tvs do that and its not a fault.... if it has a bright raster it usually collapses into a rectangular shape that keeps getting smaller until it disapears.. the lack of snow when there is no input can be agc related or weak IF tubes or weak RF amp tube in the tuner. some of my sets also do that and i dont bother since they have a perfect picture when a signal is applied. if you dont have snow but also dont have any white noise on the speaker my bet would be AGC voltage or RF amp tube. did you try adjusting the AGC? some set have a control for that...if you turn it up too much the picture gets excessive contrast, it may overload and distort or even disappear, sometimes you get trailing on white parts such as movie subtitles if the agc setting is too high
generally on tuners the RF amp tube is the one next to where the antenna connection wires enter the tuner unit
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