Question about Toshiba Satellite A105-S4004 Notebook

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Laptop lcd no-display problem

Laptop lcd is no disply condciton how to soulv the problem

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Need more information:

What Brand? Dell/Toshiba/Compaq
What Model Number?
Do the lights come on? BATT / Power / HD?
Does it work when conntected to a monitor?

Posted on Feb 04, 2008

  • Evan Mayo
    Evan Mayo Feb 22, 2008

    No display could mean several things.



    1st thing, Connect to an external monitor and turn on. If it displays a picture, It may be the LCD is defective - see below.

    =======================================



    If you see TEXT or Windows but the screen is not lighting up. Typically it is the backlight tube.



    If you see NO TEXT or WINDOWS.

    Then it is usually the INVERTER, or the Cable has separated on the back of the LCD, or the cable connector to the mother board is loose.



    Before pressing the motherboard connector down, look inside the jack, and see if any pins are bent (on the motherboard end).



    If neither of those, it may be the video output/driver chip on the mainboard, meaning it will have to be replaced.

    Hope that helps

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  • 32 Answers

1 - do powercycle
2 - connect an external monitor

Posted on Mar 13, 2008

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1 Answer

I have compaq nc6400 its working but not showing display i connect to external lcd also but its not showing disply its giving booting sound laptop is working but not giving display, pls suggestions.


It may be your Graphics adapter. If the external is connected correctly and not showing anything. There is a tiny switch the turns the Monitor on and off when you open and close the Laptop lid, perhaps it's stuck, broken, etc. I'm not sure that would shut down the external? The switch is located near the hinges. Here is a video that will help with troubleshooting: http://www.youtube.com/watch?v=2Yi6GNFcP3w

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MSI Laptop have no disply only white screen


What can you do if the laptop LCD screen turned completely white?


1. Loose connection between the video cable and the LCD screen.
2. Defective LCD screen.
3. Defective motherboard (I assume the graphics card is integrated into the motherboard).


Here's an example of a laptop with white screen.

When you turn on the laptop, it starts but the image on the screen is completely white right from the beginning.


Most likely you still can use the laptop with an external monitor.

Just connect the monitor to the VGA port on the back or side of your laptop and then switch the video output from internal to external mode.


On Toshiba laptops you can toggle between internal and external screens using Fn+F5 keys. Hold down Fn and press on F5 until you get video on the external monitor.
On IBM laptops use Fn+F7.
On HP laptops use Fn+F4.


It's possible that you have to use a different key combination on your laptop but you get the idea.


On some laptops, in order to be able to use the external monitor, you have to connect it to the laptop and then restart the laptop so the external monitor is detected by the laptop.


In some cases the laptop screen may turn white because of poor connection between the video cable and the LCD screen.


If you want to check this connection, you'll have to take apart the display panel because the connector is located on the back side of the LCD screen.


These laptop service manuals and disassembly instructions may be useful.

Always check the video cable connection first. Reconnecting the video cable may fix your problem.


If reconnecting the video cable doesn't help, most likely you have a problem either with the LCD screen or with the motherboard.


The best way to find out witch one is causing the problem is testing the laptop with another working LCD screen.


you will need to connect to another monitor or your television to your computer with the vga lead monitor connection


click start control panel display change display settings adjust resolution this may vary depending on your operating system


you should see a no 1 and a no 2 with detect and identify keep an eye on the screen when you select the number tabs this may vary depending on your operating system

when you select the no 2 tab this should be the extended desktop always click apply after making any changes

or click start control panel administration tools computer management device manager scroll to monitors right click select scan for hardware changes

if you can get an extended desktop your monitor is faulty

if you cant get an exended desktop


hope it helps

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In this case it could be as simple as a display setting. It could be the small cable that links the main board to the lcd or it could be something as complex as the board or lcd themselves. Do you know how to change any of your display settings? Is the unit using the battery when this happens or is it plugged into your power supply? When a laptop is running on the battery it will dim if it is set to in order to save battery life. Does this occur constantly or is there a change when you slightly open and close the screen?

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Can you see any life from the LCD?

It could also be a bad main board

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If you see a very dim image or black screen or flicking image on the LCD screen it means you have a backlight problem.

Connect an external monitor to your laptop and power it up, 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.

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you need to resit your ram if the problem is not solved then your display adapter is gone, you have to send it for repair

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