I have just been trying to sort out a couple of oldish PC power supplies that had stopped working. I found lots of domed caps and replaced them all. Still not got them working yest but I did notice a burn mark around one of the AC inputs to the PCB. There were 2 small capacitors near the burn mark as well and I removed them to check. They were both covered in some sort of black heat proof plastic. When I removed the plastic from one of them the blue colored cap inside fell into 2 parts (see photos attached). So I think this might be one of the problems. I cannot tell what these caps are but they look like ceramics and when I measure them the good ones show a value of around 160pf. I cant understand the markings on the caps so can someone tell what type these are and the value so I can order some.
thanks
Jon
thanks
Jon
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