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No display only external monitor works

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  1. either display screen's light is gone or
  2. the circuit related to light is having some problem
  3. the entire display is cracked...

Posted on Apr 28, 2014

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Posted on Jan 02, 2017

RescueTechLA
  • 2653 Answers

SOURCE: My display is either all black or all white. When

It's either the lcd itself the the lcd cable has become loose, either way you're going to need to take the lcd housing apart to make sure the cable is nice and secure (both ends - 1 to lcd itself, 2 to motherboard)

If the cable is nice and tight and you get the same results then for sure the lcd needs to be swapped out.

Posted on Oct 29, 2010

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1 Answer

Dark screen when switched on


Does your display work when you enter the BIOS? Have you ensured your display settings brightness are turned up?
Attach an external monitor - Look for the projector display on your keyboard (it could be F5, F6, F7, F8 - depending on your model). Often attaching external monitor will auto display monitor selector. Select "duplicate" - if your monitor still doesn't work on your machine but does on the external monitor you may have a hardware issue.

Feb 14, 2014 | Packard Bell Computers & Internet

1 Answer

Monitor going berserk


This could be due to corrupt display drivers on the notebook or the video card is going to die. Try updating the graphics drivers on the notebook and check for the issue.

If the issue still persists, then to isolate the exact cause of the issue, I recommend you to connect an external monitor to the notebook and check for the issue on it. If external monitor works fine, then the issue with LCD display screen of the notebook. In case, if the issue persists on external monitor then it states that the video card of the notebook is going to die.

To connect an external monitor to the PC, follow the steps listed below:

1. Turn off the notebook.
2. Connect the monitor cable from the external monitor to the monitor port on the rear/side of the computer.
3. Connect the monitor to a power source and turn it on.
4. Press the Power button to turn on the computer.

At this time, please follow the instructions mentioned below for switching the display to the external monitor:

The notebook's video card supports three modes. Built-in screen only; external video only; and both on simultaneously (mirrored). If you're not seeing the image on the desired device(s), the notebook's video card is probably in another mode. Press FN + F4 to cycle through the display options: Notebook display, External monitor, both.

If you press FN + F4 once, the external monitor will display & there will be no Notebook LCD display.
If you press FN + F4 twice, the external monitor will display & there will be some shading on the Notebook LCD.
If you press FN + F4 thrice, both Notebook LCD & external monitor will display.

If the issue persists on the external monitor, then this could be due to defective video card on the notebook. However, if the display on the external monitor is fine, then the issue is with the LCD display panel of the notebook. In either cases, the notebook requires a detailed onsite diagnosis by a service technician.

May 28, 2010 | HP Pavilion dv6000z Notebook

1 Answer

I want to use a NEC Multisync 1700V monitor as an external display for my Thinkpad T400. However I get no image when I hook up the laptop and change the display scheme to display on my laptop screen +...


The only I can think of is the resolution setting that your T400 is putting out that your NEC does not like andcannot display, look at the T42 resolution when the NEC is hooked up to it and try to set it to be the same in the T400.

Mar 25, 2010 | NEC MultiSync LCD1700V 17" Flat Panel LCD...

1 Answer

MY toshiba satellite 2430 CAN NOT POWER UP. BUT IT ALL THE LIGHT IS ON WHEN I SWITCH ON THE DC POWER SUPPLY SWITCH. WHAT IS THE PROBLEM? HELP.


remove the battery and remove the power adaptor ... press and hold the power button in the ON position and count to 20.

attach the AC adaptor only and press the power button ...this should fix the issue ... then re connect the battery.

if this does not work then add a external monitor .. if it lights up then hit the
Fn + F5 keys

Display modes
Fn + This hot key cycles through the power-on
display mode options.
The display mode options are:
Built-in display panel only, Built-in display panel and
external monitor simultaneously, External monitor only.
Fn + This hot key cycles through the power-on display options.
The display modes are:
❖ Built-in display panel only
❖ Built-in display panel and external
monitor simultaneously
❖ External monitor only
❖ Built-in display panel and external
video device simultaneously
❖ External video device only

Oct 07, 2009 | Toshiba Satellite 2430 Notebook

1 Answer

I have just hooked up an external monitor (LG Flatron) to my macbook--no problem with web pages, but I am unable to see my desktop or any word files. When I boot up, it says analog in the upper right...


  1. When you connect an external monitor to your MacBook (or PowerBook, for that matter), you can combine your MacBook's LCD and your external monitor to create one big monitor. That means when your mouse pointer goes off the edge of one, it will appear on the other. Open the Displays Preference Pane to configure the resolution and orientation of the two monitors. This type of configuration works well when you want to keep your main work on your larger external display, but still keep things like IM, iTunes, and email constantly visible on the smaller laptop LCD.
  2. Some windows act like they don't want to be dragged on to your external monitor. If a windows is being stubborn, try dragging it up to the menu bar, and keep dragging, even if stays stuck below the menu bar. Sometimes once you have dragged it far enough that it has room to render the entire window, it will jump to the other monitor (Terminal used to have this problem, but Apple fixed it some time ago). If that doesn't work, try dragging it from a corner of your monitor. My Adium contact list doesn't seem to want to live on my external monitor, but I can coerce it up there by dragging up from either corner.
  3. When your laptop is open, you can't switch to using the full resolution of an external monitor. I have no idea why, but it's a fact of life for MacBook users. You can use both displays in "extended" mode, or you can mirror your MacBook's display (which most likely doesn't use the full resolution of your external monitor), but you can't switch to using only the external monitor. Very strange.
  4. If you close your laptop, you can actually get the full resolution of your external display. Put your MacBook to sleep, connect your external display and an external monitor, and wake the computer up by pressing any key. You will have full use of your external display while your laptop is closed.
  5. If you really want to have your MacBook open while only using an external display, after following the procedure above, you can open your MacBook, and it's screen will remain off, which means you can still use the MacBook's keyboard and trackpad. Why you can't get into this mode using F7, I have no idea. This is a good technique for allowing some heat to dissipate while still using an external display so the lid of your MacBook doesn't melt or warp.
  6. You can boot your computer using just an external display. Just connect your external display, open the lid, hit the power button, and close the lid again immediately.
  7. In order to output only to an external monitor, you have to have the power cable connected. I tried for several minutes yesterday to get my MacBook to wake up with an external keyboard and monitor before unpacking my AC adapter from my backpack, and it wouldn't work. It took me a while to make the connection (no pun intended), but I eventually discovered that with the power cable attached, everything works as expected.

Aug 05, 2009 | Apple Refurbished MacBook 2.4GHz Intel...

1 Answer

No display and no external display everything worked fine until i replaced the cdrw


Connect first the external monitor in another computer to make sure that the monitor is still working.

You have to either switch or share the display to the external monitor. Locate the Fn button and the monitor icon in one of the function keys (from F1-F12) on your computer's keyboard.

Once you find it, press Fn + F# at the same time. (example: Fn + F8) and the display should transfer to the external monitor.

Jul 28, 2009 | Acer Aspire 5315 Notebook

1 Answer

Dell laptop connected to 1209s projector...dell page indicates searching for signal and can't


Using the Display When you start the computer with an external device (such as an external monitor or projector) attached and turned on, the image may appear on either the display or the external device.
Press <Fn><F8> to switch the video image to the integrated display only, the integrated display and an external CRT monitor simultaneously, an external CRT monitor only, the integrated display and an external DVI monitor simultaneously, external DVI monitor only, and external CRT monitor and external DVI monitor simultaneously.

May 15, 2009 | Dell Latitude D800 Notebook

1 Answer

Tried hooking the computer to an external monitor. Got the welcome screen ok, then it lost sync and went black. Tried it on another plasma; same result. SVGA cable connection.


Hi there. When you connect an external display, your laptop clones your desktop to the external display, including resolution settings. First you need to check what resolution settings the plasma can display. If your laptop is set to a resolution that the external monitor can't display, then you will lose the display once the resolution settings are loaded. You can change the laptop resolution in your Display Settings.

If you don't know what settings the external monitor can display, just open your Display Settings and set your laptop resolution to 1024x768. Almost all new monitor/tv's can display it. Connect your external display, and see what happens. If it works, but the resolution doesn't look right, then just move the resolution along one more, until you find one you're comfortable with.

N.B. Some monitors/tv's "jump" resolutions. i.e. the monitor can display 1024x768, 1300x768, but not 1280x800.

Another thing to remember is that if you are running Windows Vista, you may need to check that the Windows Mobility Center recognises the external display that you are trying to use. You can find Windows Mobility Center by clicking Control Panel, then Mobile PC. It should now be listed on the screen.

Let me know how it goes, and if it works, please rate.

Tim

Apr 17, 2009 | HP Presario V2401cl Notebook

1 Answer

Trouble hooking external Viewsonic monitor to Toshiba laptop


If I understand You are using a Monitor connecting the Monitor...
and the background is shared byboth the display however the Cursor stays only on one of them at a time.However it can be toggled among the 2.

If yes,
then this Feature is called the Extended Display.
Use the same Key Combination that you would use for external Display one More time and it should Work.

Jul 03, 2008 | ViewSonic VX924 19" LCD Monitor

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