Windows 10: Toshiba L655 won't boot past black failed to start screen.

My Toshiba L655 stops trying to boot after about 3 seconds. A black screen comes up saying "The boot configuration data file does not contain a valid OS entry". I can't get past this screen. I've tried booting with repair USB disk, all kinds of key combinations, removed/replaced battery, restarted 3 times, etc. Nothing works.


Presently running Windows 10 with fresh update. Computer came with Windows 7, updated to Windows 10, several years ago.


Does anyone know a way to boot to the command prompt, or just boot past this black screen? Thanks!

:)

 

Restore failed now it will not boot past a black screen

Restore failed, now it will not boot past a black screen. I was doing a full clean and restore of windows 10 and it was goin ok till I got an error saying that windows failed to restore and it had only option Cancel.

not it will load the post screen on my laptop and then its just a black screen and that's is. I let is sit for almost 5 hours and still nothing.

so I put in a USB stick and told to boot form that to maybe to a clean installs and it starts to boot then nothing. there is nothing wrong with the hardware I checked it all out. any ideas?

 

Laptop went black and won;t reboot

Hi Andree,

Hardware and software conflict is one of the possible reasons why you're experiencing black screen. Sometimes, it is also because of hardware failure. To get this issue fixed, we suggest that you
boot into Safe Mode by following these steps:

• Turn off your computer 3 times while booting. Windows should automatically boot to the Recovery Environment after 3 unsuccessful attempts in a row.
  
• Once you are within the Recovery Environment, select Troubleshoot, and then
  Advanced options, then Startup Settings, and
  Restart. When it restarts, you should see a number of options. Press 5 or F5 for
  Safe Mode with Networking.

Once your computer is in Safe Mode, please follow the workaround provided on this
link. Simply select the similar case that you're experiencing to show the troubleshooting steps.

Let us know how it works.

 

Black Screen on Boot

My pc has dumped while working in Unity and won`t boot properly anymore. All it does is showing me a black screen with a loading circle followed by a complete black screen with nothing. I can`t even see the login screen. I tried various shortcuts and methods
but nothing helped. Here are my observations and some information.

• I don`t have an onboard graphics card
  
• I can boot up secure mode without a problem
  
• I can boot into uefi without a problem
  
• I can boot into windows repair screen and interact there without a problem
• I can boot into grub from an linux dist on my usb Stick but when i trz to boot into linux the same problem occurres
• it is possible though to boot into linux compatible version
• Windows key + Ctrl + Shift + B on black screen (nothing happened)
  
  
• Ctrl + Shift + ESC to open taskmanager on black screen(nothing happened)
• i`ve tried uninstalling and installing a fresh version of my graphics card driver but the black screen is still apearing
  
• i`ve checked whether my windows installation or my disk is damage but both are fine
• i`ve tried to perform a clean boot but it is also not working
• i`ve tried to repair windows with an windows image on my usb stick but it resulted in the same problem midway through it

I thought my graphics card is broken but than again why is it booting into secure mode at all?