good, indeed these p8 lite have the same problem, the only solution is to resold the ic or better still change it, but it depends on the area where you write or you will not find spare parts, in the pic attached I indicate the location of the ic is under that armor, it is the same ic for the wifi and bluetooth, do not apply too much heat since you can desolder some other important ic and the mobile you kedaria dead, I hope to have helped you comments and values ​​answers greetings