I had the same problem, but at least for me the above trick didnīt work. The phone simple dindīt boot, or display any notification light.
I left the phone over night at the charcher and nothing... Tried multiple chargers, computer ports, laptop ports, etc etc, and still nothing...
Then I went and read online a little bit more about lithium ion batteries and found out that the trick is to let the phone of the charger for a couple of hours (for me was about 5 hours) and then the phone will reconized the phone.
Hope this helps someone in the same situation. (If the press and hold trick dind't work).