Just acquired a PowerBook 140, previous owner was an old lady. Set includes everything including the original bill. Adapter the was failing, opened it and needs recapping, serious leaking. Bought new 7.5v 2a adapter. Boots from original System 7 install floppy. But screen is black, backlight is fine, looks like contrast is max or min. Contrast slider does not have an effect on contrast. Recap or easier fix?
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