No Power Fault
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Full teardown of a 3DO FZ-1 that will not power on. Leaked electrolyte near the regulators, a capacitor reading almost 5 ohms ESR, and a replacement at C36.
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A boxed Panasonic Real 3DO FZ-1 arrives, reportedly dead. I go through the pads, games and manual, then plug it in to see what happens.
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A dead Arduino Nano clone with no power and no LED activity is often just a failed diode. Here is how I replaced it and brought mine back.
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A dead Spectrum +2A/B power supply, a dangerous old mains plug and the fuse that is nearly always the culprit, plus the hidden second fuse you should check.
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I open up a scrapheap Spectrum +3 to find out what is rattling, find a loose Z80 with mashed pins, and try an ill-advised power on.