Reheating a solder connection is always -a good first choice- as the electronics could have been soldered with one of many types of solder.
A lot of manufactures use Sn-Ag-Cu (tin-silver-copper) solder. Silver migration will sometimes occur in silver based solder causing a poor 'low voltage' connection. Reheating the connection will fix it.
A lot of manufactures use Sn-Ag-Cu (tin-silver-copper) solder. Silver migration will sometimes occur in silver based solder causing a poor 'low voltage' connection. Reheating the connection will fix it.