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Nice TV!!
In my opinion your HV is too high. In the pictures you posted, you have a bright screen and the HV is 28KV. This is a 25KV set. The 25EC58 will have 5 Safety Capacitors, 2 mounted on the Horiz Output Transformer, and 3 located under the chassis, that hold the HV down. You have the 2 on the HOT that are clearly the original white American Radionic capacitors that are known to fail open. On your under chassis picture I see 1 of the original capacitors, and maybe that nearby Orange Drop that could be a replacement. You should be able to see the value on the side of the capacitor. They are all connected in parallel to ground but not mounted in the same location. If you follow the blue wire, try and locate the others. As these capacitors open, or are missing, the HV will rise, if they all open, you get the lightning storm Zeno describes. If you have SAMS 1370-2, you are looking for C265, C266, C267, C268, and C272. I have had good luck with this Panasonic Capacitor as a replacement.
ECW-H16182RJV .0018uf 1.6KV
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Beam_T
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