Here is a few things to check.

Check R4719, Q1914, R4713, R4704, C4141,C3124, Q3102 (SMD),

RCA
CTC169
DEADSET BUT SOUNDS LIKE IT TRIES TO COME ON AND THEN SHUTS BACK DOWN.

CHECK/REPLACE T4401 FOR SHORT (OVER CURRENT)-UNSOLDER PIN 1 OF
FLYBACK-PUT 100W. BULB FROM PIN 1'S SOURCE TO GROUND

RCA
CTC169
SET SHUTSDOWN AT TURN ON AND TRIES TO START-UP (3) TIMES
CHECK/REPLACE C4401