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What's the chassis number?
On most of these, It's usually a shorted HOT, a blown pico-fuse (small solder in fuse that's about the size of the diode) in the regulated B+ circuit, and loose solder connections (power resistors and the horizontal driver transformer). Also, in some of these, there is a 100uf, 200V cap behind the flyback that will fail and cause the HOT to short. Also, check the regulator circuit. Many of these used an STR301xx regulator IC and a TIP47 transistor that would often fail when the HOT shorts.
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