CRT CHECK

Does it arc when HV is applied or glow a pretty blue colour? Does the elements arc within the neck of the tube when the neck is lightly tapped [necessary to have the set turned on]? Is the definition of data displayed very crisp without any trailing colour or smear? Does the tube require longer than a 60 seconds to show any display? General functional checks plus the use of a good crt checker can certify your worries.

if u got a crt set...replace it...40 year old technology