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I don't fully understand it; but, I think the clicking sound has to do with loss of power supply regulation; which, trips the HV shutdown circuit. This shuts down the horizontal drive and I think this is one of those sets where the drive keeps trying to come up; but, the shutdown circuit will keep shutting it down until the problem is fixed.
If you have access to a variac, try powering up the set at 90V or 100V. If it comes on every time and stays on, you have a power supply regulator problem. If you don't have a variac, plug the set in series with a 60W-100W incandescent light bulb.
IIRC, those sets had a weird SCR based power supply, similar to Sharp TV's.
Those sets had really nice pictures on them; but, you might want to find a new flyback to have on hand as a spare. Back in the early-mid '90's, I replaced a lot of fly's in these sets; and, that was when they were 5-7 years old.
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