The clicking you are hearing is either the stepper motor skipping steps or the hobbed gear losing grip on the filament.
Either way, it means that the filament opposes an unusually high resistence to be pushed forward.
A key information to be able to diagnose your problem is whether the clicking is on the firsts couple of layers or throughout the print.
Install the "Chitu code" plugin from the Cura website, some companies use the Chitu board as their printer's CPU and Tronxy does that. Without the plugin, it won't show a preview of your design and also it won't print.
I also have this problem with the X5S, and it's not just on the first layer (which is sometimes finicky depending on the levelling). I've narrowed it down to a few things, and I've also noticed that it varies based on the print.
Possible Causes (and a suggested solution for each):
Bad quality hotend assembly: My X5S has a teflon-lined hotend, and besides ...
I have the TronXY X1, which uses the same extruder and firmware design as the TronXY X5. The clicking does not come from Voltage, but most likely a wrong set up of steps/mm or a lightly clogged nozzle.
Quick and dirty steps/mm
Start a print that you know clicks.
wait for the clicking starts (it comes from the extruder pushing against resistance and jumping ...
Thermal expansion is opening a connection somewhere. It might not be one of your solderings, but if you shorted the board bad enough to fry pins, it could have cooked something somewhere else, and putting current through it is heating up the spot enough to break the connection. Either somewhere else in/on the board, or inside of the IC chip itself.