Apple Hardware Test (online) seems to have stopped without finishing.

[deckeda]

So I cancelled it by force-shutting down the computer. It would not Quit.

I re-ran the test, skipping the extended and it found "no trouble." Perhaps my USB installer is bad.

I found out from the Hardware Test app it's a:

MacBookPro9,2
Core i5, 2.5 GHz
Intel HD Graphics 4000
4GB RAM

Currently booted up from Internet Recovery and will try installing from that. (It delivers Mountain Lion.)