Bios Mods -The Best BIOS Update and Modification Source

after unlocking advanced settings,i change video setting,then my pc did not work and the leds did not come on,i try many ways to force flash it but no use .who can help me?
my pc is lenovo g500
bios type is insydeh20....

You disabled IGD or what?

Try resetting CMOS... Remove ntebook battery + CMOS battery for like some minutes and plug it back, maybe you get to restore BIOS settings to default... Works on my NB