Chosen Solution
MacBook Pro “Core i5” 2.6 13" Mid-2014 When hooked up to Magsafe to charge it will make a startup sound (sometimes) and will not turn on. This started happening at the beach (inside the room, wasn’t taken outside in sand or water.) I have tried the reset with the key combination. Upon looking more into it sand was in the crack between the body of the computer and the screen. What could this be doing? I refuse to send it off to Apple. UPDATE: I took it all apart and nothing seemed off and it was mostly clean. I will attach some pictures if anyone can tell something from them that’s off.
Sounds like a logic board issue. I would open it up, and clean off any debris, water, or corrosion inside. When cleaning the logic board, use 99% isopropanol. If this doesn’t solve the issue, you will probably need your logic board fixed or replaced.