Mid-2014 MacBook Pro will intermittently single beep when starting up.

Recently, when starting up my MacBook, I will occasionally (not every time) get a single beep every few seconds. Based on what I've read, this typically means "RAM/Memory not found".

However, if I shut it down, then restart it, it will boot normally. I tried clearing the SMC and that just seemed to **** it off because then it wouldn't boot at all, at least for awhile. It would just beep regardless of how many times I shutdown/restarted. Then I let it sit overnight and it was fine.

The thing is that this model does not have serviceable memory, so I can't just go out and buy a new chip.

Is it just starting to fail?

I ran a hardware test (holding "D" on boot) and everything passed.

Not sure what I should try next.

Any pointers would be appreciated.