Replace front - dead iphone :/

[Renejos]

Hey

Just had an iphone in for getting the front changed, I had some problems with the proximity sensor so i opened up my own 3G and put it in.. Everything was fine until I put the old one back in my iphone.. No power, no life.. So right now my own iphone is dead.. Both charger and macbook doesn't wake it up

Anyone who have tried this before and have gotten thier phone back to life?

After getting extremely fustered that my phone was dead, I pressed and hold the power button for like a minute, and suddenly it turned on so I'm back