that can answer.
This solution does not work when pressed, to correct certain key that can help as a guide. Device keypad for tomorrow due to pain or water remains liquid due to a short circuit occurs, can stop working and or rust may form, which is very often damaged or solvents.
If this happens you will be using membrane keypad and liquid cleaner to clean the contact pad may need.
The key to clean, but still some key keypad still may not work if the connection is not open, if you trace and then to check solution can be used under or cut-off.
Home key problem in the Grand Quattro I8552 Samsung not work the way home button, home key Jumpers ,, Centre key solution.