*WORLDS HARDEST MAC ISSUE* - *ONLY RUNNING WIN 7 + ERRORS!!!*

I NEED HELP!!!!

OS: Yosemeti 10.10

OS: Windows 7 64Bit Home Premium

Installed through bootcamp: Windows 7 - Partitioned 108GBs for Windows side.

One day it only booted into Windows 7, and the Option key was not working to load my choice between my Windows or Mac Partition.

I loaded Disk Management on my Windows, and deleted the OS X partition of my drive APPROX 200GBs, in thought that I might just reinstall OS X. It said that all of the available space for that drive was free and unused, so I thought Windows might have somehow already deleted the files on the Mac side. So anyway I deleted that partition, but it still won’t boot from USB, Disc, or otherwise.

I tried every mac boot key sequence I could to get it to boot to CD or USB and nothing works.

I tried finding a bios in the windows side or any windows boot sequence to boot to USB or CD and that doesn’t work either.

I tried installing a boot loader, but it failed to install on the windows side.

I tried installing bootcamp drivers and it failed saying:”boot camp x64 is unsupported on this computer model”

I tried the workaround by installing bootcamp through the windows cmd prompt.

That ended up giving me the blue screen of death upon reboot, and continued to happen until I used Windows Startup Repair to restore my system to an earlier date.

I have no BIOS (mac or windows), and seemingly nothing that tells this computer its a Mac.

Short of taking off the screen and replacing the drive, what can I do to erase my windows partition, and only have mac installed?