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I had 3 OS installed: Windows 7 , Fedora 17 and Mageia 2 in my Acer Aspire 4253 laptop.

I deleted the partition of Mageia and my grub got corrupted.
I didn't have an installation DVD of either Win7 or Fedora, so I used super grub 2 from a flash drive to boot my laptop.

Then one day when I was using Windows 7, my battery was critically low and laptop got hibernated. When I plugged in the power and restarted the press F2, f12 prompts were missing and the flash drive is not getting detected after POST.

What can I do now to boot my PC?

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Are you sure your hardware is OK? Are you able to get into BIOS? –  dbza Aug 7 '14 at 21:41

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