Intel UNDI, PXE-2.0 (build 083) Copyright (C) 1977-2000 Intel Corporation For Atheros PCIE Enthernet Controller v2.0.2.2(03/31/10) Check cable conneccion! PXE-M0F : Exiting Intel PXE ROM. No Bootable device -- insert boot disk and press any key PXE-M0F : PXE-2.0 (build 083)

Where do I look to see if there is a hard drive?

WOW! after having to pay $$$$ to have my power supply jack "reinforced" (with a 'hot glue gun" the tech told me), because the Toshiba design was not as sturdy as one might like, I was nearly crushed when after less than 14 days I received the black screen and the error notice: "Intel UNDI, PXE-2.0 (build 083) For Atheros PCIE Ethernet Controller yada yada yada..."
It is possible to start the computer in Safe Mode- to create a repair disk if you need one and back-up your data files. Timing is critical.... press the start button and be ready to begin pressing the F8 key immediately upon seeing the Toshiba screen, you should receive the options of how to start your computer. If you want to gain access to the BIOS setup, when you press your power button start pressing F2 immediately, where you can then check to see if your system is able to see your hard drive.
NO hard drive showing... don't cry yet.... seems that after a bit of road wear, some of the fittings wear loose. Therefore, after doing your backups etc, shut down the computer properly. THEN- remove the battery. Carefully unscrew the cover where the hard drive lives. Carefully pop the cover off, which reveals the hard drive. Using one finger on the securing bracket, lift the hard-drive by only using the sides to touch the device pulling it gently from the "plug". Examine for any debry, you can blow it out with canned air if you feel it is necessary. Look for any worn or scorched contacts- if all looks well, reinsert.
The fix - using 1 1/4" (1/4") insulation foam, cut pieces appropriate to apply pressure toward the plug, creating a very snug fit and not interfering with replacing the cover properly. Now replace the cover and be sure to fasten the screws very securely. Replace the battery.
You may have to go through one request of how you want to start your computer- and I suggest using safe mode once again and then shutting down the windows normally.
The next time you press the power button- hit F2 to go to the BIOS to check to see if the hard drive is now being seen.... if it has 're-appeared", things are looking up. Exit the BIOS and shut down the computer one more time.
Now press the power button...... If this was the problem....it should start normally. The cost is a little of your time and the insulation foam, bought at the local hardware store.