t65 power off when find network.
But on charger work fine
your battery is dead, the power consumption of your phone is to high for your battery, when you connect your charger it takes the power from the charger, not only from the battery - in some cases is the PA dead, but i think its the battery
I try with 2 another batery who work *** on another phones.
Also try with another PA and without PA same problem
also I chaing signal procesor but nothing
clean battery connector on board especialy battery test pin, change battery connector if nedded