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Test your HD using maker's HD Diagnostic extended CD scan. If you can't boot into it, try resetting the BIOS to defaults and trying the one-time BIOS Boot Menu key at boot. You can also try the HD Diagnostics on your boot disk which is booting.
You may have a bad burn or ISO on your Win7 Installation DVD or System Repair Disk.
Confirm the ISO or download another - we can help you with that if you tell us your licensed version. Then burn to DVD using ImgBurn at 4x speed.
Next try writing confirmed ISO to flash stick using Universal USB Installer with Win7 in dropdown menu. Boot under USB, Removable or HD's using one-time BIOS Boot Menu key with the HD set first to boot in BIOS setup.
Once HD is confirmed, wipe it using Diskpart from DVD/Repair CD or use the wiping utility on your boot disk. SSD - HDD Optimize for Windows Reinstallation
This should force the installer to autostart. Follow these steps to Clean Install Windows 7