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My computer shuts off whent turning on. The screen goes blank and I have you to push the power button several times for restart. Its a IBM T42 model computer and the hard drive is still working. My friends say its a power cord but that doesn't make sense due to the computer holding a charge without the cord. What is a power cord and how is my computer affected by that? Help and thanks.

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Sounds like the power supply. They cost about $50 to buy new. Easy to buy, easy to fit.

Posted on Feb 03, 2010

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Black screen when turned onno display


There are several reasons that your Toshiba laptop screen may not come on, even if the laptop appears to be running, and several options you may try to get your screen back up and running without an expensive service call.


Common causes for a blank screen include a backlight that is turned off, a display toggled to an external monitor and improper shutdown errors.


To avoid blank screen errors after your current error is fixed, make sure to follow all instructions in your user's guide to care for your Toshiba computer.


Shine a flashlight directly at your screen and look for an image.

If you see one, this means the backlight on your laptop is off but the screen is still working. This backlight normally turns off only when your screen is closed.


Look for a small metal or plastic pin near one of the screen hinges.

The screen pushes this pin in when it is closed, so if the pin is stuck in the screen closed position, the backlight will remain off.


Tap the pin several times to release it.

You may need to use a small object, such as a pencil tip or straightened paper clip, to reach it on some models.


Monitor Toggle


Press and hold down the "Fn" key if you do not see an image when you use the flashlight.


Tap the "F5" key several times while the "Fn" key is pressed.

This will cycle your screen through the various options that toggle the display to an external monitor.


Attach an external monitor, restart the computer and try this method again if no image appears on the laptop screen.


Click "Start," "Control panel," "Hardware and sound," then "Device manager "using the external monitor if you get an image there but cannot toggle the image back to your LCD.


Select the "Monitor" option to expand your selection and select your LCD monitor from the device list.


Click the "Driver" tab and select "Update" to update the driver, as this error is likely caused by a software driver error.


Force Restart


Press and hold the power button until the computer shuts down completely.


Check the indicator lights at the edge of your laptop to see if the computer is truly off or if it has simply gone into hibernation mode.


If it is off, all lights will be off except the battery-related lights if you have a charger plugged in. In hibernation mode, the power light will blink slowly.


Press the power button to restart the computer again after leaving it off for 15 to 20 seconds. This may fix the problem.


If the blank screen returns or you get a flash of images and then a blank screen, move on to the next step.


Force Power Down


Unplug your laptop from the power source.


Remove the battery by pressing outward on the battery latch and pulling the battery unit completely out of the computer.


Press the power button several times to completely discharge the computer.


Replace the battery and plug the computer back in after about 30 seconds.


Press the power button to turn on the computer.

If you get an error screen upon startup, choose to restart Windows normally.

This error is caused by improper shutdown procedures.


Hope this helps


Nov 14, 2012 | Toshiba Computers & Internet

1 Answer

My toshiba l355d black screen all fans and lights are working


There are several reasons that your Toshiba laptop screen may not come on, even if the laptop appears to be running, and several options you may try to get your screen back up and running without an expensive service call.


Common causes for a blank screen include a backlight that is turned off, a display toggled to an external monitor and improper shutdown errors.


To avoid blank screen errors after your current error is fixed, make sure to follow all instructions in your user's guide to care for your Toshiba computer.


Shine a flashlight directly at your screen and look for an image.

If you see one, this means the backlight on your laptop is off but the screen is still working. This backlight normally turns off only when your screen is closed.


Look for a small metal or plastic pin near one of the screen hinges.

The screen pushes this pin in when it is closed, so if the pin is stuck in the screen closed position, the backlight will remain off.


Tap the pin several times to release it.

You may need to use a small object, such as a pencil tip or straightened paper clip, to reach it on some models.


Monitor Toggle


Press and hold down the "Fn" key if you do not see an image when you use the flashlight.

Tap the "F5" key several times while the "Fn" key is pressed.


This will cycle your screen through the various options that toggle the display to an external monitor.


Attach an external monitor, restart the computer and try this method again if no image appears on the laptop screen.


Click "Start," "Control panel," "Hardware and sound," then "Device manager" using the external monitor if you get an image there but cannot toggle the image back to your LCD.


Select the "Monitor" option to expand your selection and select your LCD monitor from the device list.


Click the "Driver" tab and select "Update" to update the driver, as this error is likely caused by a software driver error.


Force Restart


Press and hold the power button until the computer shuts down completely.

Check the indicator lights at the edge of your laptop to see if the computer is truly off or if it has simply gone into hibernation mode.


If it is off, all lights will be off except the battery-related lights if you have a charger plugged in. In hibernation mode, the power light will blink slowly.


Press the power button to restart the computer again after leaving it off for 15 to 20 seconds. This may fix the problem.


If the blank screen returns or you get a flash of images and then a blank screen, move on to the next step.


Force Power Down


Unplug your laptop from the power source.

Remove the battery by pressing outward on the battery latch and pulling the battery unit completely out of the computer.


Press the power button several times to completely discharge the computer.

Replace the battery and plug the computer back in after about 30 seconds.


Press the power button to turn on the computer.

If you get an error screen upon startup, choose to restart Windows normally.


This error is caused by improper shutdown procedures.


Hope this helps




Nov 03, 2012 | Toshiba Satellite L355D-S7901 Series...

1 Answer

Laptop is run and start but no display


There are several reasons that your Toshiba laptop screen may not come on, even if the laptop appears to be running, and several options you may try to get your screen back up and running without an expensive service call.


Common causes for a blank screen include a backlight that is turned off, a display toggled to an external monitor and improper shutdown errors.


To avoid blank screen errors after your current error is fixed, make sure to follow all instructions in your user's guide to care for your Toshiba computer.


Shine a flashlight directly at your screen and look for an image.

If you see one, this means the backlight on your laptop is off but the screen is still working. This backlight normally turns off only when your screen is closed.


Look for a small metal or plastic pin near one of the screen hinges.

The screen pushes this pin in when it is closed, so if the pin is stuck in the screen closed position, the backlight will remain off.


Tap the pin several times to release it.

You may need to use a small object, such as a pencil tip or straightened paper clip, to reach it on some models.


Monitor Toggle


Press and hold down the "Fn" key if you do not see an image when you use the flashlight.

Tap the "F5" key several times while the "Fn" key is pressed.


This will cycle your screen through the various options that toggle the display to an external monitor.


Attach an external monitor, restart the computer and try this method again if no image appears on the laptop screen.


Click "Start," "Control panel," "Hardware and sound," then "Device manager" using the external monitor if you get an image there but cannot toggle the image back to your LCD.


Select the "Monitor" option to expand your selection and select your LCD monitor from the device list.


Click the "Driver" tab and select "Update" to update the driver, as this error is likely caused by a software driver error.


Force Restart


Press and hold the power button until the computer shuts down completely.

Check the indicator lights at the edge of your laptop to see if the computer is truly off or if it has simply gone into hibernation mode.


If it is off, all lights will be off except the battery-related lights if you have a charger plugged in. In hibernation mode, the power light will blink slowly.


Press the power button to restart the computer again after leaving it off for 15 to 20 seconds. This may fix the problem.


If the blank screen returns or you get a flash of images and then a blank screen, move on to the next step.


Force Power Down


Unplug your laptop from the power source.

Remove the battery by pressing outward on the battery latch and pulling the battery unit completely out of the computer.


Press the power button several times to completely discharge the computer.

Replace the battery and plug the computer back in after about 30 seconds.


Press the power button to turn on the computer.

If you get an error screen upon startup, choose to restart Windows normally.


This error is caused by improper shutdown procedures.


Hope this helps




Oct 22, 2012 | Toshiba Satellite A500-ST5608 Laptop DC...

2 Answers

Hi... i have a ibm t42 an am having probems with the screen going blank when theres any sort of movment to the laptop, eg. if the laptop is on a table and u stamp on the floor hard enough the screen goes...


has this machine been dropped?
sounds like a faulty (or loose) connection to the screen
if you dont know about the internal workings of this laptop please take it to a pc technician
but if you know , open it up and look at the connections both the video and screen , look for anything that doesnt look right
by the simple action of banging the ground would make it restart then

also have a look at the dc connection u might need to replace it

Dec 17, 2009 | IBM ThinkPad T20 2647 Notebook

1 Answer

IBM T30 screen ramdomly goes blank and computer freezes.


Reset your bios settings to "Bios defaults", then disable power management.
In Windows, go to device manager and try to detect new hardware. Follows screen instructions.

Mar 27, 2009 | IBM ThinkPad T30 2366 Notebook

3 Answers

Ibm t42 display turns off as if I had shutdown


You can test the computer this way. Connect the video output at the back of the laptop's base to a known working monitor. If the problem disappears completely then you know it is a screen problem, mostly likely. But if the same thing happens with the known working monitor connected to the Thinkpad, then you very likely have the BGA problem, a part that was soldered less than well (due to the restriction of lead not being allowed in the solder due to government regulations). And it may also be caused by flexing the base due to moving the laptop with poor support for its weight and resulting motherboard flex on rather delicate microsoldering. There are several services that "reball" the Ball Grid Assembly, and there are motherboards available as well that can replace the non-working ones. This is not a cheap fix to undertake but it can be done.

Mar 21, 2009 | IBM ThinkPad T42 Notebook

1 Answer

Monitor goes blank , power light goes off.


Click start, then then control panel and click on the power management icon. When you see the screen, look at the power management "scheme" and pick the appropriate setting. I assume that what you are experiencing is what's known as "Power management" . In order to achieve an "Energy Star" rating, the computer must shut off various components to conserve power. If you don't want to have your monitor shut down, select never from the options in the Power Management screen. Thanks for using Fixya.com

Jan 27, 2009 | Polyview V17E 17" LCD Flat Panel Monitor

2 Answers

Monitor blanks out / Laptop restarts


z mean sleep or power save. Try to go to the power option in the control panel and turn off all energy saving options (monitor, harddisk, computer). It this works, you can leave the setting as is or you can adjust it accordig to your preference (ie, in battery mode turn off the monitor in 15 minutes...

May 22, 2007 | IBM ThinkPad T42 Notebook

1 Answer

LCD screen goes blank and computer stops functioning


This must be a loose connection on the lcd behind the lid or in the hinge, I would not atempt a repair, laptops are a nightmare, take to a specialist repairer.

Nov 27, 2006 | IBM ThinkPad T42 Notebook

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