computer wont boot (broadcom?)

when i turn my computer on I keep getting this error

i know computers but i dont KNOW computers anyone please help me? idk what to do
Answer #1
You checked your cables make sure everything is connected right? From that screen i get its not detecting HD. Run a liveCD like Hirens BootCD 10 and scan HD for errors.
Answer #2
You checked your cables make sure everything is connected right? From that screen i get its not detecting HD. Run a liveCD like Hirens BootCD 10 and scan HD for errors.
what cables exactly you mean? its on a laptop btw
Answer #3
Enter your BIOS and change the boot priority. Your computer is trying to boot from the PXE Boot ROM. Make sure your HDD is booting before your LAN