if you can plug in an external monitor and it shows on the external display then either the laptop screen is damaged or you have switched the display to external as default. If nothing shows then it may be a motherboard problem.
If you have previously created a password reset disk, insert it into your computer and reboot. Your computer should boot into the reset disk and display on screen instructions to reset your password. If you have not created a password reset disk, you're going to have to use some other password recovery tools. Download chntpw from here and burn it to a CD. Insert the CD into your computer and reboot. It should load the CD automatically. It will prompt you to select a hard drive; usually, you can select the correct partition by just entering 1. It will prompt you for a registry path; enter Windows/system32/config/. Then it will give you the option to edit or reset user passwords.
Have you spilt anything on your keyboard?First thing to try is to plug in an external keyboard, do all of the keys work as they should?If they do then we now know for sure it is something to do with the laptop keyboard and not a software fault. You should try cleaning the laptop keyboard, this should only be done with the laptop powered off and the battery removed. The only proper way of cleaning sensitive electronic equipment like this is with compressed air, you can buy cans of these from your local supermarket. Using short controlled blasts, try to remove the dirt from under the keys.Leave for a short while, put the battery back in, power her up and see if that has sorted it. If not then it may be time to replace the keyboard, here is an instructional video for the R850, http://www.youtube.com/watch?v=IC0JBIZJIcIgo on youtube and search for your particular model.
Hello,PC Performer is a rogue registry cleaner and usually gets installed with free programs or by clicking ads. I wouldn't trust that you have that many errors as it is just trying to goad you into purchasing it but it will have slowed your computer down to trick you into believing there are errors. Uninstall PC Performer from your Programs and Features applet in the Control Panel. Depending on how it got installed you might have some other unknown programs need removed too such as Speed Analysis2 or 7goGames. Check through the list for any others you didn't installOnce uninstalled download AdwCleaner from http://general-changelog-team.fr/fr/downloads/finish/20-outils-de-xplode/2-adwcleaner. Close all open programs and internet browsers then open up AdwCleaner and click the Scan button, once the scan completes click on Clean.To remove PC Performer from your internet browsers download Junkware Removal Tool from http://thisisudax.org/downloads/JRT.exe Double click the tool (jrt.exe), it will open in command prompt, press any key to run the scan, a log will pop open when it completes.Run an anti-malware scan to make sure nothing has been missed, if you don't have one I recommend the free version of MBAM http://www.malwarebytes.org/products/malwarebytes_free/
Somewhere on your laptop (usually in the function keys), there is a dimmer & a brighter button for the screen. Usually has a little sun icon on it. Try pressing the brighter (larger sun) and see if an icon pops up with a status bar (dotted line). Press the brighter key about 5 times and see if that makes a difference.
On some Toshiba laptops, there are, under the mylar covering underneath the ram modules, two silver solder points which if shorted out when the laptop is powered on, will force a bios reset eliminating the password.The points mentioned (jumpers) are usually labelled J1 or Clear Cmos
