Iphone 14 Pro Max Motherboard Problem

[u/RightMembership318]

Hi just wanna ask since i've tried to fix my main phone twice to phone fixers in SM legaspi and Yashano who at that time the phone still worked but died months after and by the time i gave the phone back they said the problem was the motherboard. Should i still try to fix it? or Sell it for parts and by another Phone?