Some photos showing the effect of oxidisation (green residue) on the metal edges of components as a result of the memory/settings backup battery that is PCB mounted. The battery is an RS Components catalogue number 422-371, which is a rebranded Mempac 2.4V, 110mAh Ni-MH cell.
Removal of the existing battery exposed some more of the damage from the corrosion – notably track damage around the holes where the battery legs were.
The area was cleaned up using a fibreglass abrasive pencil and IPA. Any peeling tracks were also tested for continuity from the components they connected to.
A new replacement battery was ordered and installed. One of the existing holes that also suffered track damage was actually not connected to anything, so was safely omitted during soldering. The battery was stabilised with hot melt glue to prevent any flex or pivoting from detaching the damaged track.
Of Sound Mind 