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Toshiba's laptop with 4GB storage and an AMD A10-8700P Quad-Core APU processor.

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Why won't my screen turn on?

My screen is dark and I can’t see anything!

Answered! View the answer I have this problem too

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@lauratamayo this is a poorly formulated question. You will have to give more information if you would be serious about finding a solutions. Always let people know what exactly happens when you turn your computer on. Do you have any lights coming on? Have you tried to enter the BIOS on startup? Is it even starting up? You are not providing enough information to get a real answer.

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Sorry, I thought I did.

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3 Answers

Chosen Solution

Hi @lauratamayo ,

Try connecting an external monitor to the laptop and see if there is a display showing OK on it. Press Fn + F4 (both together) to step through the display options of laptop display, external display or both.

If you have a TV with HDMI inputs, you can use this as an external monitor so long as you have a HDMI cable with the appropriate connectors at each end to be able to connect between the laptop and the TV.

If the external monitor is also not showing a display when connected to the laptop then you may have a motherboard or GPU problem.

If there is a display on the external monitor, try shining a torch at an angle close to the laptop screen to check if you can detect an image at all. (don’t forget to toggle the Fn +F4 keys to switch the display back to the laptop).

If there is a display visible on the laptop when using a torch (it will be very faint, try in a darkened room to help see it) then you have a backlight problem. This could be either a faulty backlight power supply from the motherboard, a faulty backlight power cable to the screen (or LVDS cable if it is in the same cable) or a faulty screen.

If there is no display visible on the laptop when using a torch then you have either a faulty LVDS cable (or cable connection at either end) or a faulty screen

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The battery could be dead. Ensure the computer is powered on and fully charged.

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1 Comment:

@davidfoster I understand that this is an assignment and not a real answer but you do want to make sure that you think it through. You are making an assumption that the OP is running the laptop on battery. What about if it is running on the AC adapter?

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A blank screen may be caused by a screen brightness setting that is too low. Try increasing the screen’s brightness with buttons on the keyboard if the screen in completely dark.

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Laura Tamayo will be eternally grateful.
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