Either way, after only two weeks I would take it back and exchange it under warranty.
Bingo.
But I hope there are no telltale signs that you opened the case.
Some companies don't mind that having been done. Here in Denmark, ACER couldn't care less about the seal being broken.
All the take into consideration is what's been altered, compared to the original product, isn't the cause for the fault.
Example: My old ACER box gave me BSODs on every boot up. I called ACER (It's still under warranty, though just few weeks away...) and they told me that it was most likely the RAM that had gone partly bust, but they didn't mind me having swapped out HDDs by the bucket, GFX card, PSU etc etc - as long as these alterations weren't the cause of the fault.