my 1st roundie

[mustang84]

just aquired my first roundie! rca ctc 16 with a white cabinet.very clean set.crt checks okay-neither god nor bad.i got a picture on it by changing a resistor in the vertical. it was broken in two.now my issue is no color.6gh8a and 6cy6 not lighting up.as i am very limited in my skills (i am willing to learn!),can anyone give me some guidance,always dreamed of a roundie to call my own.