ral:
The clicking usually means that the switching power supply is trying to
start, it then detects an over-current situation (short), shuts down,
then trys all over again.
Have you checked the Horizontal Output Transistor (HOT) for shorts ?
You can check this using the diode-check on your meter.

Are you getting any secondary voltages from the power supply ?
Any voltage on the collector of the HOT ?
John