No bootable device, check cable connection

My toshiba satellite L745 is recieving the following at the startup:

Check cable connection!
PXE-M0F: Exiting Intel PXE ROM.
No bootable device -- insert boot disk and press any key
Last night it shut down unexpectedly several times. then, when i used it in the morning this error shows up.
I have gotten into the setup by pressing f2 at the startup. In the boot tab, it says:

5.LAN Atheros Boot Agent

what should i do? im willing to reformat my laptop, there's no important files in it anyway.. but i need it in my thesis. :( please help.
2 answers Last reply
More about bootable device check cable connection
  1. it looks like the BIOS does not see your HDD
  2. Emerald said:
    it looks like the BIOS does not see your HDD

    What does that suppose to mean?? :O Do i need to replace it??
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