'74 Chromacolor II Overload

[Spinning Head]

I've got a '74 or so 19" Chromacolor II E line chassis (19EC45) that I got a from a great aunt's estate about 40 years ago. It was daily driver for awhile but hasn't been powered up for probably 20 years. When powered now, line current is approximately 3.6A and circuit breaker pops after a minute or so. Listed line current is 1.4A. So not a dead short and no obvious shorted diodes or horiz. out. I initially thought a leaky run cap in the ferro-resonant transformer. But same condition after disconnecting the cap. All of the DC power supply voltages are only at about 10%. 130V = 13V; 230V = 23V, 24V = 2.8V, +35 = 2.8V; -35V = -2.5V. I disconnected the yoke to break the 130V and also tried removing the vertical module to try to isolate the overload, but haven't been able to isolate it yet. This set has the instant on, with a separate filament transformer. With power off there's no current draw and no glowing filament, yet DC resistance measures the expected 145 Ohms. So this may be a clue. Any thoughts as to how to isolate the overload?