Question about Toshiba Satellite A135-S4527 Notebook

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Data Shows up only on External Monitor, not on Laptop Screen

Laptop screen is completely black, nothing shows up on it. Can use the computer but only with an external monitor hooked up. I have used dual displays in the past with this machine no problem. I am attempting to fix it through changing settings in the Display control panel. Cannot get the images to extend onto the laptop screen. Can check the boxes to make laptop screen active and primary, but this does nothing. Slider bar to change resolution of the laptop screen is locked, it won't let me adjust it(resolution is stuck at 800 x600). Can change resolution of external monitor fine.
I tried pressing function + f4 but still nothing shows up on laptop screen.
I am afraid toshut down or reboot. What if it end up not even working on the external monitor when I start it up?

I feel like there is a solution to this that I am missing.
My Toshiba satellite screen only comes on for a second or so and goes black. By pressing the lid close button I can see the backlight come on. External monitor working but when i use dual output then notebook screen flickers on for a second. Changed close lid to do nothing. no help.

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  • mrjoekraut Aug 26, 2008

    My screen only comes on for a second when the system boots or I change output to dual. If something was that wrong would it not come on at all? My backlight works since it comes on when i hit the close lid button. The laptop is almost 3 yrs old so no warranty. I am thinking its a conection that cant handle the juice to screen or something to do with the close lid button.

    Seems my problem has not been talked about on here or any other forum I can find.

    Thank you for trying thou.

    joe

  • Anonymous Oct 04, 2008

    Same thing happened to my HP. The screen will work if i slap it though!

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  • 63 Answers

If your system won't display anything w/o the external monitor. there's something wrong with the LCD's backlight. you may have to contact your laptop's manufacturer and check if this laptop is still under warranty. you may have to get the lcd replaced.

thanks.

Posted on Aug 26, 2008

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Hi,

Since the laptop works on the external monitor, then it would be safe to assume that it is only the L:CD display part that is the issue. Often LCD display (of laptops) are working but only that you can see the actual display. One way to verify is to shine a flashlight at an oblique angle to the screen, semblance or part of the desktop could be seen. If the desktop could be seen (albeit very very dark background) then it could either be the CCF Lamps (cold cathode florescent) or the inverter that powers the lamps.

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This would be a good place to start for inverter boards. This is a nice tutorial if you are considering a DIY.

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any way to hook up an external monitor to try it?

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