i have a toshiba satellite L740- P4010 laptop, it's bios not open what i do?

[souravkayal]

I press F2 & F12 But bios not open.win 7 is installed in this laptop but i want to install win xp but it's boot menu not open.i opened the bios battery for a minit and put it again and press F2 & F12 but its not work . can anyone tell me what to do.''Turn on while tapping 'esc', then choose 'f2' for setup'' its not work.

 

[penguintech]

Turn on while tapping 'esc', then choose 'f2' for setup.

 

[souravkayal]

Turn on while tapping 'esc', then choose 'f2' for setup.

its not work