If you are technically savvy, you could check for poofed components in the power supply. Possible bad parts include fuse, switching transistor(s), small resistors, and other components. Sometimes when one component fails, it will take some others with it, depending on the circuit design, and exactly how & what blows up. Electrolytic capacitors often ooze a bit, or bulge when they fail. If you see one like that, it should be replaced as part of the repair.
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