Crt question

[radotvguy]

Ok guys , i have a question and hopefully , someone can help . I have two round color crts in my attic . I believe they are 21axp22 . I pulled one out yesterday and tried to test it , unfortunatly nothing , it didnt even light up . Is there anything that i should be checking for . I am pretty new to tv repair , i mainly did radios for years however i came across a few nice consoles and got hooked on tvs , they are a bit of a challenge but a fun hobby .