What is the solution when the touch test fail?

[wazgehtab]

Model Name: = ASUS_Z00AD
Firmware Version: = ww_4.21.40.134_20160825
Rooted or not: = NO
Frequency of Occurrence: = whenever I try to write something
APP Name & APP Version (If your issue relates to the app): = no special app
i cant type all letters.

[Anders_ASUS]

1 backup
2 factory reset
if no improvement
3 send to service