Wont turn on

HELP!

I love my e250 … what did i do? I was charging it attached to the computer … it did not go into write mode, but the lightning bolt was on indicating charging … i disconnected it from the USB and the screen went black and now nothing … i tried the recovery mode and nothing happened. no matter how long i hold the power button nothing happens … 

any ideas??

Maybe the battery is loose. Open the back with a little screwdriver–save the screws–and pop out the battery, wait 30 seconds and snug it in again.