Question about Belkin F1DL102U 2-port KVM Switch

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Lcd problem for laptop

Thanks for help but how can i reboot because there is no picture in the screen of my laptop. I think the problem is inside the machine.

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  • rogergp Jun 02, 2008

    I can use my mouse and keyboard when I've switched to the laptop, but I am getting no image on the desktop monitor. Have tried re-booting, F5, unplugging the cables, etc. Any advice? Tx r



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I don't think I have a function key on my desktop HP keyboard. I have one on my laptop and tried that. Also tried all the other ctrl/alt/etc, with the F5 keys to no avail. My best guess is the cable. Do you have any other thoughts? r

Posted on Jun 03, 2008

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Can you operat an function key,

Function key Fn in your key pad hold and press F5,

it will togell the screen,,,,,

Posted on Dec 27, 2007


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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.




Aug 28, 2014 | Acer Aspire Computers & Internet

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Sounds like you need to think about buying another laptop. Or replacing the LCD screen. Search ebay or amazon for screens.

Dec 03, 2012 | Computers & Internet

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My lenovo lcd sometimes dosent work

hey, i think there exist the problem with the latch connecting the screen and board... anything of loose connection or internal damage kind of thing....

Nov 28, 2012 | Lenovo G550 PC Notebook

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My lap screen will not show a picture. The screen is completely black. I think I might need a new video card.

Hi,Thanks for using fixya,

Remove the battery, and unplug the A/C adapter and hold down the power button, for 40 seconds.Soon your laptop will reset,and run well.Now you will install all the accessories and start.

If same as before
Or you think that the lcd has been defected ,need to replace lcd or repair ccfl lamp
or the inverter ,
LCD INVERTER this helps.

If you are helped you can rate on the 4 thumbs and post a short comment,because,
this is the free side and I can get the chance, to help people like you .
Thanks for using fixya .

Jan 25, 2011 | Computers & Internet

1 Answer

My screen has gone totally black. rebooting

The most likely problem in this situation is that the inverter is burned out. Do you hear sound? If your computer boots and there is sound, it is definitely the inverter board. You might want to try to replace the inverter board. I think it's about $15 on ebay. If you are tech-savvy you can take the computer apart. The inverter is usually located below the LCD screen. for more info on replacing the inverter click here

Sep 28, 2010 | HP Pavilion dv9000z Notebook

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My laptop screen is bright. Brightness control works but no picture. The picture is ok on external monitor. Sometimes a faint and incomplete picture appears on startup but disappears after a few seconds....

This might be a sign of a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp.

Aug 25, 2010 | Compaq Presario 700 470024-192 Notebook

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I got black screen a few seconds after reboot my LENOVO 3000 N100, type 0689 - 2BS, Laptop run normally without screen light, I need to flash screen in order to read it. I tried unplugging the battery and...

Hi. I think the LCD screen of your laptop needs a replacement because I think the backlight on that LCD is already busted thats why you need to point a flashlight or some sort of light just to see the display. Powerdraining your computer wont work because this already a hardware issue with the LCD, that's why when you switch display with your monitor it works fine. I would suggest replacing the LCD of that laptop or try calling Lenovo tech support if your laptop still under warranty so that they would replace it for free. This is no. to contact for your Lenovo laptop US/Canada 1-800-426-7378, Australia 1-300-880-917. Hope this Helps

Feb 28, 2010 | Lenovo 3000 N100 Notebook

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Dv5 screen housing diassembly

I have taken apart several laptops, incuding an hp. usually the pastic cover pops off. the you will see the screws underneath.

Jul 03, 2009 | HP Pavilion DV5-1000US Laptop

1 Answer

Screen issues

It's not the vedeo card, it's the LCD issue and will need to be replaced. You can order a replacement from ebay and unscrew the frame and replace the inside screen, you may need a manual to do this, contact your Laptop company for manual to replace LCD inside the LCD frame.

May 21, 2009 | Sony VAIO VGN-FS980 Notebook

1 Answer

Dead screen on hp dv2000

If you hear the hard drive spinning and you think Windows is working but you can't see an image then :-
You could have a defective screen - a defective inverter or a CCFL lamp or simply the video cable needs reseating. After reseating the video cable and the problem is still there then :-
To determine if you have a LCD screen or video card problem, read this and follow the 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 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 for parts, repair service and DIY info.

May 19, 2009 | HP Computers & Internet

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