Congratulations on getting your Poco X3 Pro fixed! It's great to hear that the technician was able to solve the issue by reballing the CPU and that you saved money by not having to buy a new phone.
It's important to take care of our devices and ensure that they are properly maintained to avoid issues like deadboot. However, if such issues do arise, it's always best to seek the help of a professional technician to avoid further damage to the device.
I hope your Poco X3 Pro continues to function well and serve you for a long time. If you have any other questions or concerns, feel free to ask.