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There has got to be a better method than this, but... <br />A diode will drop 1.2v each. So if you connect 4 of them together in a line (in series) you should drop 4.8v which will be enough for you to carry on testing until someone gives you a better idea. <br />Obviously a diode only lets power through in one direction, so you will need to be careful which way round they face. If there is no power, then one or more of them are the wrong direction. <br /> <br />Glen.
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