Black Screen

So, yesterday, I dropped my Droidfrom around a foot or foot and a half distance to a slightly carpted floor (slightly because it can barely be considered carpet anymore) and the screen stopped working (I've sadly dropped it from higher onto concrete before, but only ended with scrapes). I took the battery out and then replaced it after a few seconds and did it with the SD card to see if that would help. Neither worked so I googled and found a post mentioning to do a certain button combination to get it to reset in a way. That didn't work.

So, today, I went to a local Verzion store and showed 'em my phone. They guy said it was basically dead due to the screen not functioning (though we could both feel vibrations from unlocking and buttons and such). So, figuring it was, I browsed the store and figured the TBolt was my best option. I bought that, but we couldn't get my contacts switched using my gmail, so I figured I'd try at home. When I got home, I plugged my phone up to the laptop using the charging cord and my screen decided to start up.

So I called the guy I just bught my TBolt from and he said the screen could do that, but it would likely just shut off again after a few days. Now, having very little faith in humanity and knowing his job is based quite a bit on what he sells, I came here wanting to know if he was right.

Will my phone's screen go blank again unexpectedly or only if I drop my phone again or not at all for a long time? I figured I'd give the TBolt a 7 day trial (since the guy said I had 14 days to return it), but I wanted to know if that was even neccessary. If it won't, I'd like to wait for the Bionic or Droid X2 (maybe even Droid 3) or the Xperia Play if that ever comes out in the US.

Thanks in ahead for the help.