I added a external monitor to my laptop i went into display settings and turned off the internal laptop monitor so i can just see the external monitor, this was fine until i tried to reverse it and i think i disabled the adapter in the external monitor now i cant use the internal laptop monitor or any external ones. have i completely ruined my laptop can i get the screen back?help please

How about looking at a screen?

Use an external monitor

Briefly;

Your laptop has an external display device port. (Connector)
I do not know what it is, because you didn't state the laptop manufacturer name, and model number; Elizabeth

It may be a VGA port, or HDMI port, or Mini-HDMI port; or DVI port

http://en.wikipedia.org/wiki/VGA_Connector

(Scroll down for VGA Cable example)

http://en.wikipedia.org/wiki/HDMI

(You can click on any photo, and it will enlarge)

http://en.wikipedia.org/wiki/File:HDMI_Connector.jpg

http://en.wikipedia.org/wiki/Digital_Visual_Interface

Laptop OFF, monitor OFF, connect the external display device to the laptop.
(VGA = Monitor. DVI = Monitor. HDMI, and Mini-HDMI usually = HDTV. They all compromise an external display device)

Turn the monitor/HDTV on.
Turn the laptop on.
By factory default settings, the display should show on the external display device.
IF not;

There are at least 3 display options. For this example I'm going to use a VGA monitor.
(For a VGA monitor you can use a CRT type of monitor. Looks like a small TV. Or you can use a flat LCD screen monitor, if it has a VGA Cable attached)

The basic 3 display options using a VGA monitor are;
1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

Hold the Fn key down, and at the SAME time tap once on the Display Toggle-Over key.

Which key is that? Dunno. Laptop manufacturer name, and ......................

It will be one of the F keys at the top. F1 through F12.
The Function key will have a monitor icon on it, and usually an arrow on one side........Or perhaps two monitor icons sitting side by side.
(Empty rectangle is a monitor icon)

Still no display on external display device?
Hold the Fn key down again, and tap once more on the Display Toggle-Over key

[If memory serves for Display Toggle-Over key;
HP = F4
Acer = F5
Toshiba = F5
IBM/Lenovo = F8

Don't write that in stone, however.......]

Once you post the manufacturer name, and model number; then I can guide you step by step.

Post back in a Comment.

Regards,
joecoolvette

By whom Kathleen? You?

I ask because there are two ways to answer this;

1) You performed the procedure, and less for me to post.

2) You did not perform the procedure, and I need to explain from the beginning; using a diagnostic flowchart, pictorial guidance, and guidance from me.

While I wait for your reply, suggest perform this simple test first;
Laptop OFF, monitor OFF, attach an external monitor;

1) VGA monitor to RGB (VGA) port on left side of laptop.
Can use a CRT type of monitor (Looks like a small TV), or flat LCD screen monitor if it has a VGA cable.

http://en.wikipedia.org/wiki/VGA_Connector

OR;

2) S-Video port on left side of laptop for TV, or external video display device

http://en.wikipedia.org/wiki/S-Video

Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.

By factory default settings, the display should show on the external monitor. (Display device)

If not there are 3 display options available;
1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external monitor
3) External monitor ONLY

Press, and hold the Fn key down, and at the SAME time tap once on the F5 key.
The F5 key is the Display Toggle-Over key.

Still no?
Hold the Fn key down again, and tap once more on the F5 key.

Display on external monitor means there is a problem with;

A) Video Cable
B) screen Inverter
C) LCD screen

Which means if computer display was working correctly before;

1) Whoever repaired it could have used the external display option, and it needs to be set back to internal

2) The Video Cable connections are not tight, not correct.

Loose at motherboard, screen Inverter, or LCD screen.

3) Anti-Static Procedures were NOT followed, and laptop is now an expensive paperweight.

Post back in a Comment.

Regards,
joecoolvette

To me this is a hardware problem.

Let's diagnose, and see Shunka_Reid.
Connect a VGA monitor to the laptop.

A) Laptop OFF, monitor OFF, connect a VGA monitor to the VGA port, on the laptop.

http://support.gateway.com/s/notebook/2009/gateway/nv/NV78/NV78lv.shtml

Number 3 - External VGA display port

General example of VGA connector (port), and VGA cable,

http://en.wikipedia.org/wiki/VGA_Connector

Scroll down a little for the VGA cable example.

You can use a CRT type of monitor, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.
General example of a CRT type of monitor,

http://www.wisegeek.org/what-is-a-crt-monitor.htm

B) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.
By factory default settings, the display should show on the external VGA monitor.

IF not;
There are at least 3 display options available;
1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor.
3) External VGA monitor ONLY.

Press, and hold the Fn key down, and at the SAME time tap once on the F4 key.
The F4 key is the Display Toggle-Over key.

Still no?
Hold the Fn key down again, and tap on the F4 key once more.

Do you get a good display on the external VGA monitor?
Post back in a Comment.

Also, has the laptop ever been cleaned on the Inside, to your knowledge?

Regards,
joecoolvette

1) Laptop OFF, monitor OFF, connect a VGA monitor to the VGA port on the Right/Rear of the laptop.
Example of a VGA connector (Port), and a VGA Cable,

http://en.wikipedia.org/wiki/VGA_Connector

Scroll down a little for an example of a VGA Cable.

You can use a CRT type of monitor, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

Yes. You can also connect an HDMI cable to it, and HDTV with this capability.

Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.
By factory default settings the display should show on the external VGA monitor.

If not;
There are at least 3 display options;
1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor.
3) External VGA monitor ONLY

Press, and hold down on the Fn key. At the SAME time tap once on the F5 key. The F5 key is the Display Toggle-Over key.

Regards,
joecoolvette

Plug in the external monitor to the monitor port. Open display properties and set the display to use either 2 monitors (internal and external) pr just to use the external monitor. If just using the external monitor, you can usually us the FN key and one of the function keys to switch to the external monitor.

Don't freak out!

You just tapped the Display Toggle-Over key.

Hold the Fn key down, and at the same time tap ONCE on the F5 key.
Still no?
Hold the Fn key down again, and tap once more on the F5 key.

There are at least 3 display options for your laptop, Shivam;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external display
3) External display ONLY

You set it by accident to external display ONLY.

Regards,
joecoolvette

A) Post THE Product Number on the bottom of the laptop. It's in the white Service Tag. P/N = Product Number.

B) On the left/bottom side of the LCD screen frame (Display Bezel), there is a switch. Looks like a small button.

This is the Internal Display Switch. (May not be in this exact position for your model. Look around on the Display Bezel, that surrounds the LCD screen)

When the laptop is closed, the switch turns off the display, (Image on screen), with the computer still on.
Tap it a couple of times lightly, with the eraser on the end of a number 2 pencil.

See if anything happens. That switch may be bad.

C) Laptop off, monitor off, connect a VGA monitor to the VGA port on the laptop.

Example of a VGA cable, and VGA connector, (Port),

http://en.wikipedia.org/wiki/VGA_connector

You can use a CRT monitor, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

C) Turn the monitor on. If a CRT type of monitor allow it to warm up.
Turn the laptop on.

By factory default settings, the display should show on the external VGA monitor.

IF not;
There are at least 3 display options,

1) Internal monitor of laptop ONLY
2) Internal monitor AND external VGA monitor
3) External VGA monitor ONLY

Press, and hold down on the Fn key. At the same time tap once on the Display Toggle-Over key.

Don't know what exact HP laptop you have. For most HP's it is the F2 key, or the F4 key, that is the Display Toggle-Over key.
(Key has an empty rectangle on it, with a vertical line on each side)

Still no display on the external VGA monitor?
Hold the Fn key down again. (Bottom left of Keyboard)
Tap once more on the Display Toggle-Over key

NO display on the external VGA monitor, means you have a bad graphics chipset.

(By using an external VGA monitor, you are bypassing the Internal Display Switch, and the Display Assembly. (Internal monitor of laptop)

If you have a display on the external VGA monitor, you have a problem with;

1) Video Cable, (Display Panel Cable for HP)
or
2) Display Assembly

Post back with your results, and if you have a display on the external VGA monitor, we will go on.

If you do not have a display on the external VGA monitor, you are looking at motherboard replacement.

Post back in a Comment.

Regards,
joecoolvette

No display on laptop's internal monitor, and there is no blinking cursor?
Start with seeing if it is a display problem.

Connect a VGA monitor to the laptop. If the display does not show on the external VGA monitor, the problem is the graphics chipset.

You did not state the model number of the Fujitsu laptop, therefore all I can give is generic basic information.

1) Laptop OFF, monitor OFF, connect a VGA monitor to the laptop.
This is an example of a VGA Cable, and a VGA connector,

http://en.wikipedia.org/wiki/VGA_connector

The VGA connector (Port) on your laptop is either on the side, or back of the laptop. May be marked on laptop as RGB.

You can use a CRT type of VGA monitor, (Looks like a small TV), or a flat LCD screen monitor that has a VGA cable.

2) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.

By default the display should show on the external VGA monitor.
If not there are at least 3 display options;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

Press the Fn key down, and at the same time tap once on the Display Toggle-Over key.

The Display Toggle-Over key is one of the F keys at the top of your keyboard. F1 through F12.
It will have a monitor symbol on it.
(For example most HP laptops use the F4 key )

No display on external VGA monitor? Hold the Fn key down again, and tap once more on the Display Toggle-Over key.

If no display shows on the external VGA monitor you have a bad graphics chipset. Motherboard replacement.

If a display does show on the external VGA monitor, you have a problem with the Video Cable, and/or in the Display Assembly.

Post back with the results, after using an external VGA monitor, in a Comment.

Regards,
joecoolvette

Try pressing the function key and the monitor key (Fn+ F key). This will cycle through the display modes (Internal monitor, external display, or both). Your monitor key will look like one of the following: Usually after you reboot the default setting should be to run the internal display only. Your monitor could possible have gone out, possible the LCD panel or the backlight.

when you hooked up ur laptop to an external monitor, did you adjust the display settings, you have to do that if ur operating system is xp or older.