Question about Toshiba Satellite L455DS5976 Notebook

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I have a small black mark in my screen. maybe a magnet mark? how Do i get rid of it

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  • Candi Noble Nov 08, 2012

    I saw on another post someone suggested flashing the screen. But how do I do that?

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  • Toshiba Master
  • 7,627 Answers

How small? you could have pixels out. Has the monitor suffered any damage?

Posted on Nov 09, 2012

  • Candi Noble Nov 09, 2012

    No damage. Its about the size of a pencil eraser. Not perfectly round tho

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2 Answers

What caused a black screen


I had the same problem. While rebooting the laptop the screen would be on for a few seconds after it finished rebooting then the display would go black. If you looked very carefully at the screen you could see the image was there but there was no light behind the screen to make the image visible.

I removed the black plastic display bezel cover that goes around the edge of the display screen to check out the lights and wiring. I found a small magnet that belongs inside the display bezel had fallen out of it's slot in the plastic bezel and was stuck to the inverter pcb (printed cicuit board). To fix this problem I secured the magnet into it's slot inside the display bezel with a bit of glue. After fixing the problem and putting the display bezel back together the laptop worked normally.

The magnet could possibly fall out if the laptop was closed and upside down then dropped on a hard surface. Mine did not feel very secure in the mounting slot which is why I secured it with glue.

This magnet is how the laptop knows the lid is closed. When the laptop is closed the magnet is moved closer to a magnetic switch on the inverter pcb and activates the switch. The laptop thinks it is closed and shuts off the lights behind the display screen. When the magnet fell out of it's slot and stuck to the inverter it activated the magnetic switch all the time whether the laptop was open or closed. This caused the laptop to think it was closed and shut off the lights behind the dispaly screen as soon as the reboot finished.

74aa5d08-ab1b-415f-b65b-e5730298479e.jpg

d9a5bae7-b43c-4797-8790-a1d667831be9.jpg

0bff3520-95d0-4d35-9d8a-c5e3e0d627fd.jpg

Aug 28, 2014 | Acer Aspire Computers & Internet

2 Answers

Compaq presario cq61 display not show


I had the same problem. While rebooting the laptop the screen would be on for a few seconds after it finished rebooting then the display would go black. If you looked very carefully at the screen you could see the image was there but there was no light behind the screen to make the image visible.

I removed the black plastic display bezel cover that goes around the edge of the display screen to check out the lights and wiring. I found a small magnet that belongs inside the display bezel had fallen out of it's slot in the plastic bezel and was stuck to the inverter pcb (printed cicuit board). To fix this problem I secured the magnet into it's slot inside the display bezel with a bit of glue. After fixing the problem and putting the display bezel back together the laptop worked normally.

This magnet is how the laptop knows the lid is closed. When the laptop is closed the magnet is moved closer to a magnetic switch on the inverter pcb and activates the switch. The laptop thinks it is closed and shuts off the lights behind the display screen. When the magnet fell out of it's slot and stuck to the inverter it activated the magnetic switch all the time whether the laptop was open or closed. This caused the laptop to think it was closed and shut off the lights behind the dispaly screen as soon as the reboot finished.

74aa5d08-ab1b-415f-b65b-e5730298479e.jpg

d9a5bae7-b43c-4797-8790-a1d667831be9.jpg

0bff3520-95d0-4d35-9d8a-c5e3e0d627fd.jpg

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1 Answer

Samsung Flat Screen 40" Model # LNT4069F what is


maybe there is something near on your screen like Magnet or any devices that can cause the black line.. try to remove any gadgets or any thing near your screen

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2 Answers

The screen is going black like its in sleep mode when i open it up


I had the same problem. While rebooting the laptop the screen would be on for a few seconds after it finished rebooting then the display would go black. If you looked very carefully at the screen you could see the image was there but there was no light behind the screen to make the image visible.

I removed the black plastic display bezel cover that goes around the edge of the display screen to check out the lights and wiring. I found a small magnet that belongs inside the display bezel had fallen out of it's slot in the plastic bezel and was stuck to the inverter pcb (printed cicuit board). To fix this problem I secured the magnet into it's slot inside the display bezel with a bit of glue. After fixing the problem and putting the display bezel back together the laptop worked normally.

This magnet is how the laptop knows the lid is closed. When the laptop is closed the magnet is moved closer to a magnetic switch on the inverter pcb and activates the switch. The laptop thinks it is closed and shuts off the lights behind the display screen. When the magnet fell out of it's slot and stuck to the inverter it activated the magnetic switch all the time whether the laptop was open or closed. This caused the laptop to think it was closed and shut off the lights behind the dispaly screen as soon as the reboot finished.

74aa5d08-ab1b-415f-b65b-e5730298479e.jpg

d9a5bae7-b43c-4797-8790-a1d667831be9.jpg

0bff3520-95d0-4d35-9d8a-c5e3e0d627fd.jpg

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1 Answer

Every time i have my t v on i get a black bar at the top of the screen with small squares of adverts. I think its shop mode. Please help me get rid of it Mark.


I think you might have the Closed Caption settings on, make sure to check in the menu. If not then contact Philips directly.

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1 Answer

I have purple heads on my tv


Maybe you have some kind of magnetic material on top of the TV. TV screens respond to magnetic field. If the problem is not caused by a magnetic material being near it, then it is the degauss (meaning demagnetize) circuit inside. You can also degauss a screen using electromagnet. If placed around the screen of the TV in the right way. I have never used a magnet to demagnetize a TV screen, but maybe orienting the magnet at just the proper angle may also demagnetize it by cancelling the magnetized area. You can also make a TV screen demagnetizer using a loop maybe made out of plastic tube and winding enamelled wire onto it. The loop has to be about the size of your TV screen. Make sure you put tape over the whole thing, and connect a plug so you can plug it to the ac outlet. Once plugged in, the ac current will produce magnetic field to cancell out the magnetized area, when you wave the loop around your screen. I once made this as one of my tools when I worked at a TV repairshop.

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