i have recientally purchased a Casio G-shock 2288 GW-500A from someone. and this morning when i woke up the screen was blank and there is just the word "Charge" blinking on the upper portion of the screen. is this something that i can take care of myself, or do i need to have the watch serviced? and could i possibly reiceve a manual for this watch if you have one in PDF format or something similar. Thanks Christopher Mercill