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Those little GEs were suprizingly durable considering the cheap-looking construction. But one frequent problem was the H. osc coil which would break at the lugs or pull out of the board.
And there was a quirk in the design (which may or may not apply to your set). The H. oscillator would refuse to start. Sometimes you could get it started by clicking the set on and off, or sometimes it wouldn't start at all. Come to find the oscillator runs on B Boost instead of the B+ supply.
The cure was to run a Si diode and a resistor (i forget the value) from the osc. to the B+ rail, so the osc. would start on B+. Then when the Boost came up, the diode became reverse-biased and the osc. switched seamlessly over and ran on Boost as designed. But it would start every time, on B+.
The H. output would not red-plate with the oscillator dead since the B+ was only 130V.
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