Computer screen flickers on and off

contact dell.

Sounds like you screen is dying on you.

It sounds like you have a bad inverter board or bad lamp, but chances are it is the inverter board located at the bottom of the LCD screen inside the housing. I suggest taking it to a computer shop for a estimate before you decide to have it repaired.

Sounds like a backlight failure of the LCD.
Things to try:

1. Replace the inverter, about $25
2. Replace the LCD about $200

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When this happens it means the back light needs to be replaced. The back light is a light bulb that lights up the screen from behind the LCD display.

not to get to concerned just yet, a few tips, when you press on the top of the laptop case by the screen area in the back of the laptop do you notice the screen flickering off? and when you let go dose it come back on? if so this can be a faulty wire or bad inverter, they are actually both very simple to fix and relatively cheap fixes.

If this laptop is only a few monthe old, then it should be still under warranty. I suggest you return it to the supplier for repair or replacement under warranty. If you try to repair it, most likely you wil void your warranty.

If you don't have this choice then read the following info.
You most likely have a faulty CCFL lamp or inverter, To determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
for parts, repair service and DIY info.

plz concert with hardware vender coz it is not possible for u. if u can see perfect boot screen than u must re installing ur oprating system.that mean ur hardware is perfectly working. enjoy good luck

I recommend you to reinstall the display drivers of your laptop as the issue may occur due to the corrupted display drivers.

Uninstall the display drivers from Device Manager.
Expand Display devices.
Right click on the display device and select Uninstall.

On restarting the laptop, windows will detect the device and reinstall the display drivers.

You can even install the display drivers from your notebook support website:

www.csd.toshiba.com

If you have another computer, try hooking to it and see if it flickers on it too.
If you hit Ctl-Alt-Delete and choose Task Manager, does the box flicker there?.
Adjust the monitor ratio in the Display Settings/Display/ Display Adapter Properties, Monitor Tab, see drop down (increase screen refresh ratio to higher number).