Lenovo Yoga 2 Pro

Hello,

I setup a bios password and haven't used my yoga in a long time. I wanted to use it today and I have totally forgot the pass. I have lots of them because of work and I cant think of it. Please let me know how to remove it. Removing the cmos and battery does not work on these new ones and I cant even do boot menu. Please help. I'm really tired and nobody wants to help and they send me to lenovo and I'm out of warranty and they want 160 bucks for fix. I don't want to send it so please help.