If there's evidence of tampering with optical drive, will my warranty be voided

If they notice, bye warranty!

 

You can always call them, explain the situation and see what they say without giving them your serial number or computer.

 

The way I understand the warranty (it's been a while since I read it) is that Apple is not obligated under the warranty to repair something that you have damaged; however, they should still work on parts of the computer that were not affected by modifications you made. That doesn't mean they'll follow that, though.

 

I suggest just bringing it in. You need it repaired anyway.

Or go hunting for the screws. Most hardware specialty shops should stock those torx screws.

 

I think Apple probably leaves the warranty ambiguous on purpose to both serve their needs in rejecting warranty repair, but also to give leeway to the stores to fix computers for customers. Whereas if the warranty was more clearly defined, they may not be able to help someone out. Seems like a fair two-way street.

 

I believe you should be okay. The warranty I see it is that if it's a component that you did not touch or modify, they will work on it. I went in with stripped screws on Friday with hopes they could help (botched optibay attempt). I showed it to the "Apple" person and he called it accidental damage. 222 bucks to repair as they said they could damage the top plate. So basically they wanted me to pay a person who potentially can break something to fix it. Understandable that it is apple protocol. He did see my SSD and he said the HD was the only thing covered in my situation. Since the trackpad broke on it's own, I believe you are entitled for the repair.

 

Not that this really means anything but I know someone who swapped out the optical drive with the original HD, after installing an SSD, and made use of Apple Care twice. He didn't put it back to stock configuration and both times required them to open the MBP. Both times the Apple Store employees knew full well what he did and couldn't care less.

I'd be surprised if an Apple store employee gave you a hard time even about the screws.