When you dis assemble the phone and check strip jack as shown in below diagram you may find some carbon or rust in it. So make it clean and apply heat with heat gun to make it dry.
Just refer to the solution given below and track said main home key line roads.
Only manage to apply a jumper wire in places where the Samsung J700H/F Wave connecting said power key.
Samsung J700 Home Key Not Working Problem
Samsung Galaxy J7 Home Button Ways
Samsung Galaxy J7 J700 Home Key Ways,Solution,Problem Jumper,Not Working Problem Repair Ways
When you dis-assemble the phone and check strip jack as shown in above diagram you may find some carbon or rust in it. So make it clean and apply heat with heat gun to make it dry.
Hints to fix Samsung Galaxy J7 J700 Keypad Problem Repair Solution:
Check/clean the keypad PCB matrix.
Clean/replace the keypad membrane..
Note: Please note that even though every solution posted on our website is tested by one or more members of our team before posting, but still we do not take any responsibility for any damage it may cause to your cell phones. Use these repairing solutions at your own risk.