Question about Toshiba Satellite L855D-S5220 Laptop

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Toshiba boot screen won't appear when turned on

I want to boot my toshiba from a usb drive carrying ubuntu. I was able to do it several times yesterday. But when I turned on the computer today, the toshiba logo does not appear nor does pressing F12 take me to the normal boot menu (it takes me to a screen that says "choose OS" and "press F8 for advanced booting options"). Instead of the toshiba logo and option to press F12 to go to boot menu, the pc shows a black screen with the flashing underscore in the top left corner then it starts windows. I have windows 7. Also the fn keys are not working the same way. When I press fn+F12 it turns on/off the wireless, but when I press the wireless button (F12) it will take me to that alternate boot menu asking me which OS and so on. Please help. I would like to be able to restore the boot menu and the old key combination: fn+F12. Yesterday I did play around with the boot order in system settings. But I can't access any of that. Isn't there a separate fn key to load system settings, that would solve the problem, I think.

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My first response is to ask if you have upgraded to the latest BIOS. If no then I would suggest that you do that first. This sounds like the BIOS may not support booting from a USB drive. You need to go into the boot options portion of the BIOS and see if a USB drive is part of the options. If it is the move it head of the hard drive on the Laptop. This will make the USB drive if it is installed the first device to look for when trying to boot. Now on some systems if the USB drive is not bootable the process will hang as there is no OS on a high priority boot media.

Posted on Feb 13, 2014

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It will help if you mention the Toshiba model so we can ascertain which BIOS is running. But in general, take the USB out of the slot, and then when the machine starts up, press F2 when you see the prompt.
Alternatively if you do not see the prompt screen, press the ESC key for 3 seconds immediatley as you start the machine and then F1- that should present you with the Setup screen

Posted on Feb 13, 2014


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Posted on Jan 02, 2017

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SOURCE: bios batt

if you leave it long enough does it boot ?
press F2 and go through the settings and check for something like "display boot menu" or similiar.

remember to save your settings upon exiting

Posted on Nov 21, 2008

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SOURCE: my laptop is not loading

I would contact amd speak to the technical department, they are very helpfull. It may be a RAM fault or a hard drive fault but as you have data on the drive, I don't want it to go pear shaped and for you to lose any data.
Hope that helps.

Posted on Mar 09, 2011

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SOURCE: Hi, I have a Toshiba Satellite A135-S4527 and have

first you can download your lap top manual and carefully read it . click here to download

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SOURCE: i hv a toshiba c660 satellite laptop, it does not

From the description the hard drive has failed, have the hardware tested before it is replaced.

Posted on May 22, 2012

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SOURCE: won't boot up, get the toshiba screen asking to

I put a new hard drive in my nephew's Toshiba Satellite L305-S5955. When I turn it on it says I need a boot disk. Where can I get a disk, please?

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Did you try pressing F8 key at boot up?

  • 1

    Turn on your laptop and look at the first screen that comes up as soon as it is on. This screen will tell you "Press x key to enter setup", replacing "x" with the actual BIOS access key. It's usually "Del" or "F2" on Toshiba systems.

  • 2

    Press the key firmly and quickly before the screen goes away. If you do not react quickly enough, you will miss the window of opportunity to enter the BIOS. On Toshiba systems, this window of opportunity is somewhere between two to five seconds.

  • 3

    Navigate your BIOS configuration screen to the "Boot" tab. It is usually just before "Exit."

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    Press the button for "Save and Exit" in your BIOS. The correct button is usually F10.

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    Booting from a USB Stick

    Here you go:

    Download the Ubuntu Live ISO (if you dont have it already) and burn it to CD
    Restart your computer (booting from the Ubuntu Live CD)
    Insert a 1GB or larger USB flash drive
    Open a terminal window and type sudo su
    Now type fdisk -l to list available drives/partitions (note which device is your flash drive Example: /dev/sdb). Throughout this tutorial, replace all instances of x with your flash drive letter. For example, if your flash drive is sdb, replace x with b.
    Type umount /dev/sdx1
    Type fdisk /dev/sdx 
    type p to show the existing partition and d to delete it
    type p again to show any remaining partitions (if partitions exist, repeat the previous step)
    type n to make a new partition
    type p for primary partition 
    type 1 to make this the first partition
    hit enter to use the default 1st cylinder
    type +750M to set the partition size
    type a to make this partition active
    type 1 to select partition 1
    type t to change the partition filesystem
    type 6 to select the fat16 file system
    type n to make another new partition
    type p for primary partition 
    type 2 to make this the second partition
    hit enter to use the default cylinder
    hit enter again to use the default last cylinder
    type w to write the new partition table
    Type umount /dev/sdx1 to unmount the partition
    Type mkfs.vfat -F 16 -n usb /dev/sdx1 to format the first partition

    "Alternately you can try mkfs.vfat -F 32 -n usb /dev/sdx1 (doesn't always work)"
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    Using Windows to prepare and move the files to the USB Stick:
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    Download using this link -
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    Hope this helps.

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