To fix charging problem like charger no response or shows no cahrging indication when the battery charger is plug-in, you may first check the charging pin connector for possible damaged or use another working charger. If that does not solved the problem, check the fuse and the protection diode as shown on the solution below.
Nokia 1680c or Nokia 1681c Not Charging Solution
You may also trace the charging voltage connection line paths for possible open or cut-off lines. If both charging components and the line paths is okay the possible problem is caused by a faulty UEMCLITE chip,. You may need to reheat or rework this chip and replace if necessary.