Toshiba Satellite P105-S9722 Notebook "jbat motherboard jumper" Questions

...jbat) near it , try to change its position for some seconds while power is off , this way will clear cmos and set the mainboard bios to default settings. start the system hit delete or F2 to enter ...

...motherboard is fried, how come my computer was working perfectly until the battery went out of power. Honestly, what I thought at first is that there was a problem with the AC adapter :( Any ideas ...