No Battery Available
recently I figured my battery needed replacing because I received the X through the battery symbol
i replaced the battery from ifixit.com and installed it and no luck it stays the same
i've tried all the resets and everything and i've been running my laptop through the mag charger all the time
do i need to replace the fan or mag DC-board or something?
MacBook Pro (13-inch Mid 2012), iOS 7.0.2