Dead MacBook ... MagSafe Orange
I also have a dead MacBook Pro retina early 2015. (not liquid damage)
When plug in the MagSafe charger it goes from green to orange.
System completely dead, no fan spinning, no chime... Nothing!
Actually, that is exactly what the mag-safe adapter does when it charges a battery. It is green when first plugged in, then if it needs it it starts charging the battery and changes to orange.
Lets see if it will sententiously boot. Disconnect the battery from the logic board, also the mag-safe. Press and hold the power on button for ten seconds. Now plug in the battery then the mag-safe. It should reboot.
If it is out of warranty, I you want a swing at it, isolate the issue to the board.
If it is the board indeed, measure G3H for voltage and resistance.
If you don't understand what I am saying (not meant in a negative way, just stating facts), then you need to find schematics and start learning, or send it out for repair.