While any bulged cap is a failure to me and most techs, you can't go with a voltage only reading. Those capacitors smooth out the ripples in the supply and you would need an Oscilloscope to really see if the supply line was good.
Today's techs just swap boards. Some replace caps.
TV powers up and back lights but no picture or sound.
Replaced PSU and TV worked perfectly for approximately 10/20 minutes and reverted back to "powers up and back lights but no picture or sound".
In inspecting newly installed PSU identified capacitor C210 with bulged top and minor leakage which is likely the problem.
However, in checking the output voltages from this PSU board with bulged capacitor all outputs appear correct as marked on board.
Ideas / suggestions please.