It's an extremely tough set to fix many times. An open capacitor CP08
or bad connections from glue securing coil LP02 to the board can cause
the transistor to fail. Other possibilitys include a bad HV
transformer, shorted diode near the HV transformer, picture tube with
no vaccuum, bad solder connections anywhere in the HV area ect. Not
many easy fixes for output shorting in the TX series sets.