In the first step, whether mobile phone volume up and not too low or the setting profile.then check speaker of Nokia 5250 with one meter and as do not show continuity to modify and replace it.If speaker shows the continuity check or those items that are defined in the cellphone diagram above. Check out these links and make these jumpers as one of them is missing.in diagram top left you a color chart to determine color scheme for the chart to see.
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