Hi, erika@ and welcome to MobileRead.
First, some more information please.
Did you charge it using a wall charger or USB to the computer?
Also, I did a search and came up with the below results...
edit: link didn't work
new link to try for information:
https://www.mobileread.com/forums/showthread.php?t=49735
As you will notice from the various answers in the "frozen threads", when the battery is totally dead it seems to require a full, long charge - usually quicker with a wall charger (Sony or a PSP charger).
Then various reset and / hold button / etc options can be tried if needed. But, the full charge must be first.
I hope this helps. Please let us know how it goes.