Ac7878, it sounds like your hard drive is no longer working. It fives you the error because it is trying to look for an operating system, and even tries to boot from the network. you can try and access your BIOS and see if your boot order is set to optical drive, the hard drive. Turn network booting off. If that does not work, try to boot from CD with a bootable disk. I recommend a lite Linux version, like Puppy Linux. It should boot up from CD. If it does, you can try and reinstall your operating system to see if that fixes it, or replace the hard drive if it does not. IF Puppy Linux can access your system, try to recover any important files, for as long as you can access it. Remember that formatting, reinstalling your operating system, and of course replacing your hard drive, will cause you to lose your files. Hope this helps, good luck.
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'''UPDATE'''
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Here is the procedures to access your BIOS based on the model: Here is the procedure for the different models:"
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How do I get into the BIOS Setup?
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Depending on which model you are using the method of getting into the BIOS will vary. Please select your model from appropriate list below and following the relevant instruction.
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BIOS Access Procedure 1
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Boot the system up and hold down the‘Esc’ key, then press F1 when you get the check system message. You are then in the BIOS Setup and you can make your changes and save and exit by pressing the ‘End’ key.
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Libretto 50
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Libretto 70
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Libretto 1xx
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Portégé 3xx
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Portégé 6xx
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Portégé 2xxx
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Portégé 3xxx
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Portégé 4xxx
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Portégé 7xxx
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Portégé Mxxx
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Portégé Rxxx
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Satellite 1xx
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Satellite 2xx
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Satellite 3xx
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Satellite 14xx
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Satellite 18xx
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Satellite 20xx
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Satellite 21xx
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Satellite 2400
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Satellite 2410
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Satellite 2450
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Satellite 25xx
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Satellite 26xx
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Satellite 27xx
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Satellite 28xx
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Satellite 4xxx
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Satellite A10
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Satellite A20
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Satellite A40
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Satellite Mxx
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Satellite Pro 4xx
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Satellite Pro 4xxx
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Satellite Pro 6xxx
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Satellite Pro A10
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Satellite Pro A40
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Satellite Pro Mxx
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Tecra 5xx
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Tecra 7xx
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Tecra 8xxx
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Tecra 9xxx
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Tecra Mx
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Tecra Sx
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TE 2000
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TE 2100
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BIOS Access Procedure 2
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Boot the system up and hold down the ‘F2’ key. You are then in the BIOS Setup and you can make your changes and save and exit by selecting the 'Save Changes' option.
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Satellite 35
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Satellite 10xx
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Satellite 11xx
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Satellite 16xx
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Satellite 17xx
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Satellite 19xx
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Satellite 2430
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Satellite 3xxx
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Satellite A30
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Satellite Pxx
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Satellite Pro A30
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BIOS Access Procedure 3
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The BIOS cannot be accessed via boot up on these systems. To make changes to the BIOS setting on these models please use the Toshiba Hardware Setup utility located within Control Panel. The BIOS settings can be reset to their default valies by booting the system up and holding down the‘Esc’ key, then press F1 to reset to default settings when prompted.
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Satellite 5xxx
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If you can tell us what models Toshiba you have, I can be more specific about your boot options.
Ac7878, it sounds like your hard drive is no longer working. It fives you the error because it is trying to look for an operating system, and even tries to boot from the network. you can try and access your BIOS and see if your boot order is set to optical drive, the hard drive. Turn network booting off. If that does not work, try to boot from CD with a bootable disk. I recommend a lite Linux version, like Puppy Linux. It should boot up from CD. If it does, you can try and reinstall your operating system to see if that fixes it, or replace the hard drive if it does not. IF Puppy Linux can access your system, try to recover any important files, for as long as you can access it. Remember that formatting, reinstalling your operating system, and of course replacing your hard drive, will cause you to lose your files. Hope this helps, good luck.