Samsung j7 Back Recent Button not working after water Damage
if you are having problem of back and recent touch Button in Samsung Galaxy J7 It can be solve with a few basic tips and tricks that I am going to post here in my blog. In first step check if there is a any glass protector on the screen remove it then try out by touching recent and back keys. If it can not be solve then check out phone for water and rust damages in that case some time keys not work proper.
When disassembling the phone keep in mind about strips and jacks do not apply much pressure on them apply slight force to open then phone panels. after disassembly of Samsung Galaxy J7 check out parts very carefully if there is some water damages or rust and carbon on parts clean with PCB them with electronics cleaner and apply low heat after cool board then try to check.
in above diagram you can find out jumpers so check these track also and if you find electronic circuit is broken apply these jumpers as given in Samsung Galaxy J7 solution diagram.
