I had almost exactly the same circumstances as the thread described. MY battery had been getting weak and pretty much done and I should have replaced it sooner, but it went dead and then it failed while plugged in on the AC adapter apparently because it would not respond later when I started the laptop. I put a new battery in but it is still coming up with this same error message and I cannot get past this message:
"PXE-E61: media test failure, check cable PXE-M0F: Exiting Intel Boot Agent"
This may be a hardware problem and if so I may need some professional support help. Thank you for all you input in advance
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Boot into BIOS and verify the boot order. Your hard drive should be second, after your CD/DVD drive. If it is, see if you hard drive is recognized in BIOS. If not, you may have a defective HDD. You can re-seat the HDD, if you know how. Other than that, not many options. Maybe defaulting the BIOS settings.