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What I meant about 0-ohms was just measuring the 3.3V-rail alone, from one end to the other. If I go 3.3V-to-ground, it's kind of weird. The reading starts at 0.5-Mohms and slowly climbs up, until displaying Overload.
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That's actually a good sign; you don't have a short between power and ground. It just means that your voltmeter is charging up the bulk capacitance. Try turning the voltmeter leads around so that the ground lead (black) connects to VCCINT and the red lead connects to ground. That sometimes makes the reading settle down quicker. The key thing is that its not 0-ohm. It doesn't mean its ok, since it could have blown the circuit open, rather than shorted it.
By the way, you need to measure the impedance of the VCCINT core voltage. The 3.3V sounds a bit too high. Its more likely that that is an I/O voltage. Look at the circuit diagram, and measure the impedance of the core voltage from the output of the regulator; actually, check all the power supplies.
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I'll suck it up and buy a new one now
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Buy yourself a new USB-Blaster while you are at it :)
Cheers,
Dave
Honored Contributor
