Cleaning is a good idea.
But dont use hard plastic tubes… a brush is better.
Much besser is compressed air… do it outside 😉
If there were exploded caps, then there would be no function at all, the TV would be dead.
The problem is: a almost dead cap looks quite like a new one, only if it leaks it can be identified or if it is blown up/deformed.
Caps dont like heat, so most of them die in hot areas and dirty areas… when they dont get cooling air/ventilation.
This hardware is already 20 years old, most units i repair are 30-50 years, not only B&O, also controller/relais in very old cars, fuel injection or controls . I usually take a board, clean it and replace all caps on this board. I dont measure them, testing takes time and is not 100% safe in circuit. I replace them all. Since i do not only one unit or whatever, i restore always 4-10 in series, using 1 test unit for testing the boards. I do only hardware i have for testing… or if it is very simple to find the defect. Starting with the Power supply is usually the best way to start…
Buying caps is not easy. There is not the best cap, it’s always a compromise. The most longliving caps are MKS WIMA, i replace almost every electrolyth cap up to 1uF with a WIMA or even with the new X5R or X7R SMD parts.
The bigger caps come from Panasonic, FC or FR series. They are not easy to get, right now they are very hard to buy… but 10.000h lifetime at 105 degrees are good material.
The problem is: you need a very huge sortiment of caps of every size and dimension to repair them in a usefull time. I think, i have around 200kg and around 25.000 caps in storage right now… just for my retirement.
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