Reset bios to default Toshiba Qosmio x770 laptop

Hi I stuffed my cmos/bios in my Toshiba Qosmio x770 laptop
Changed the setting on speed from normal to fast
Now it jumps straight into windows starts to load up for no more than 3 seconds then freezes or will try to auto repair 3/4 seconds and freezes
It does not show Qosmio splash screen to let me get back into cmos to fix up the problem
The battery is non standard it is soldered into place so I cant just take it out to reset to default
If any one can suggest some fixes for me to try it will be very much appreciated