MBP Logic Board Replacement

Hey everyone,

I've got a MBP (2018, 15") that has worked flawlessly since I purchased it. After completing my final exams before Thanksgiving it has been off in my bedroom, and upon attempting to use it, I discovered that it will not power on. I have contacted Apple Support and a local certified retailer, who both agreed that it likely hardware-related after attempting various resuscitation methods. Apple Support informed me that I could mail the device in, however this option wasn't listed on the link that I was sent in order to do so. The retailer also offered to repair it, but stated it would cost around 80% of the original value of the MacBook Pro (~$1,800). As a student, I'm unable to afford this level of a repair.

My question for the forums is the following: from what I've read, it seems that this may likely be a logic board issue, and logic boards for this particular device run for around $600 online. Of course, I am not equipped to make this repair, but before I give up on the device entirely it would seem that there must be a cheaper alternative than what I was offered. Can anyone point me in the right direction regarding a more reasonable way to repair this device? Or am I misguided in my thoughts of it being related to the logic board?

I have used Apple devices for many years, as I've known them to be reliable and user-friendly. It has always been worth the money for me because they tend to last longer (I'm writing this from a 2011 MBP that's still kicking, despite being too slow for the programs I run for grad school). However, I cannot justify spending as much as I did on my new MBP for it to last for less than three years. Your help is greatly appreciated.