I have been using this old laptop exclusively to play video. So I have not used the laptop's monitor for some time.
In order to use the laptop connected to the TV I had to switch video output modes by holding down "fn" & pressing F5 to toggle video modes.
But now, I want to use this laptop again as a laptop, with the laptop's LCD screen. I thought it would be a simple matter of disconnecting from the TV & toggling through the video modes to get the LCD back but that doesn't seem to be working. It was quite a while ago that I connected the 8200 to the TV, so while I can't remember, I'm wondering if I made a change in settings to deactivate the LCD. If I did I can't find it now to re-activate it.
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May 6, 2013 - 10 posts
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The universal way to display a split screen (on laptop screen, and on monitor/projector at the same time) is to hold down the function key (Fn) and press F5. You may have to press F5 a couple times.. by pressing F5 is cycles through a couple different modes (external video only, laptop/external video, and then back to only laptop screen).
There are a couple of reasons that a laptop screen could blank our. The first is that many laptops have the ability to output video to an external monitor or projector, such as for video presentations. In order to save battery life, there is a function key combination that can be used to blank the laptop screen. Most laptops have these "functions" on the F1-F12 keys in blue and there is an "fn" key that must be used with them to activate the function. Look for a key that has a blue "square" with vertical lines on either side of it. This is the Monitor function key. Press and hole the "fn" key, then press the Monitor function key. See if the screen returns. A corrupted video driver could also be the problem. Do you have any display when booting up? If so, try using the F8 key to get to SAFE Mode. If you have a display there, check and see if there are any problems with the video driver, or just reload the driver. The third possibility is the the LCD's backlighting source may have failed. IF this is the case, you probably have an older laptop and replacement is usually cheaper and more cost effective than repair.
Turn you laptop off. Connect an external monitor to your laptop. Turn the laptop on and see if you get any video signal on the external monitor (you have to use the right button combination e.g. Fn + one of the Function keys). If you get a signal the problem comes from the screen/backlight/inverter/cable. If there is no signal, check the memory (if you have 2 memory modules use only one at a time, the other one could be defective or check your memory with another laptop or use some known good memory etc.). If the memory is ok then most probably the motherboard is defective (at least the integrated video card). Expensive to fix or to replace it. Have it checked by a professional. Do you have any warranty on your laptop? See your dealer or HP representative first.
From my experience I can tell that this problem may be related to the following:
1. Loose connection between the video cable and the LCD screen.
2. Defective LCD screen.
3. Defective motherboard (I assume the graphics card is integrated into the motherboard).
Most likely you still can use the laptop with an external monitor. Just
connect the monitor to the VGA port on the back or side of your laptop
and then switch the video output from internal to external mode.
On Toshiba laptops you can toggle between internal and external screens
using Fn+F5 keys. Hold down Fn and press on F5 until you get video on
the external monitor.
On IBM laptops use Fn+F7.
On HP laptops use Fn+F4.
It’s possible that you have to use a different key combination on your laptop but you get the idea.
On some laptops, in order to be able to use the external monitor, you
have to connect it to the laptop and then restart the laptop so the
external monitor is detected by the laptop.
Have you tried booting into "Enable VGA" mode via the "Windows Advance Option" screen? By press F8 before Windows XP loading screen comes up. In this mode the Video Card drivers are disabled. So if your screen appears normal and not white in this Mode then it is your video card drivers which are causing the issue.
I have encountered this same problem once in the office when i was trying to do the same thing.
The solution: *Assuming you have windows xp*
1) make sure the projector and the laptop are connected (FN+F8), do a right click anywhere in your desktop then go to settings by default Monitor 1 would be your Lattitude D620 and Monitor 2 should be your projector, to make sure of that click on the 'identify' it should show a 1 in your laptop and a 2 on the projector 2) now select monitor 2 and select 'use this device as my primary monitor' check mark, by doing this your videos should play in your monitor but they will be a blank/black screen on the laptop (basically we are reverting the order).
This problem is most likely to be caused by a bent or broken pin on the CRT video cable at the VGA connector, OR, this could also be caused by a damaged VGA connector on the back of the laptop.
If neither VGA connector is at fault, the problem could be caused a damaged (kinked) CRT data cable, or internal damage to the VGA connector on the back of the laptop, though I suspect the problem is more likely to be external, and you probably won't have to disassemble the laptop to locate the culprit...