Fn F3 do not work/

Are all your cables connected correctly? Are you doing this wirelessly if so is your router working, look in "view network computers and devices" in the control panel.

Connecting an External Monitor or Data Projector
You can switch to anexternal monitor or data projector by two methods.1. Connect the externalmonitor to the laptop's video port, power up the external monitor first and thelaptop. The video information will automatically switch to the externalmonitor.2. If you power up thelaptop first then you can switch the video output to the external monitor bypressing the Fn key and one of the Function keys, depending upon your make andmodel laptop. You can also toggle between the external monitor or both LCD screenplus the external monitor or back to LCD screen only by pressing the Fn keyplus one of the function key. Here is a list of keycombinations for some of the laptops :-IBM ThinkPad = Fn + F7HP and Compaq = Fn + F4Toshiba = Fn + F5Dell = Fn + F8

The Fn+F3 key toggles between these display settings when you press these keys again.
To the external projector only.
To both the external projector and laptop screen
To the laptop screen only.
Repeat pressing the Fn+F3 keys will cycle through these screen settings again.

power ON your projector and laptop
connect your laptop and projector with VGA cable and press
if your laptop PANASONIC or NEC (Fn+F3)
ACER, HP,SHARP,TOSHIBA (Fn+F5)
LENOVO, SONY (Fn+F7)
DELL, EPSON (Fn+F8)
FUJITSU (Fn+F10)
APPLE (F7)
If problem exist remove the VGA driver in your laptop and reinstall the correct driver not a standard display driver

HELLO,

If your LCD or DLP projector displays no image, this could be a variety of problems. First, check that the projector has power. On the top of the LCD or DLP projector should be some lights. With power, those lights will be on. If it has power, check to make sure that the projector lamp is firing. If so, go to the source. Make sure that it is connected with a VGA cable or USB cable to your computer, or with an RGB cable, S-Video cable or DVI connection to your VCR/DVD Player. From a laptop computer, the VGA cable should be connected to the VGA out connection, and into the VGA in connection on the projector. Are both ends tight?

If everything has checked out so far, the solution probably lies with the external monitor port. Check this by holding the Fn key on the keyboard, then press the F7 key. (On some computers, the key might be F5 or F3. Try these if F7 doesn't work) Each time you press the Fn / F7 combination, you will cycle your display through the following settings:

* Press Fn / F7 once: The laptop screen only
* Press Fn / F7 twice: The projector port only
* Press Fn / F7 three times: Both the laptop and projector port
* Wait a few seconds after each time you press the key combination to let the LCD or DLP projector refresh. Nine times out of ten this will result in seeing your projected image.


Hope this helpout....

Hi
Connect the monitor, flat panel, or projector to the laptop's 15-pin video connection on the back of the computer as shown to the right. Once connected, your laptop may automatically switch to the new external display or you may be required to press a sequence of keys in order to switch from the laptop to the external display. For example, often either Fn + F3, Fn + F5, Fn + F8, or Fn + F9 is pressed to switch between alternate displays. So if your laptop was Fn + F3, pressing and holding both Fn and F3 at the same time would switch between displays. Often, the alternate key pressed in conjunction with the Fn key will be labeled as CRT/LCD and/or have a picture of a monitor on the key or close to the key. Unfortunately, the keys pressed to switch displays is dependent on the model and manufacturer of the laptop. If none of the above key sequences work, consult your laptop documentation or consult your laptop manufacturer.
Some laptops also have the ability to have the display on both the laptop and external display and/or one or the other at a single time. Laptops with this ability can switch between these modes by continuing to press the same function keys until in the mode the user wants.

If you connect a laptop projector or external monitor before you boot up your laptop, the video most likely will go directly to that external device. To have both the laptop LCD and projector you will need to press the Function key that has the monitor/laptop symbole (this key will be a dual function key and you will need to press the Fn key first and then the Function key with the monitor/laptop symbole. This Function can be any key between F3 and F12, it depends on the brand of the laptop.
When you press this key it will toggle between
LCD only
External monitor/projector only
or both LCD and external monitor/projector

1.Try FN+F3 or Fn_F4 or maybe Fn+F10 ..best is to see on the keyboard F1..F10 and see it should have like a TV logo.

2.Make sure you connect the cable to correct port on your projector.Becasue some projector do have another connector
for getting the output back to PC.

Takecare.

does it work with external monitor ?
the key should be Fn+F5 or Fn+F6
I believe you need to hold fn and press f5 to choose the target (lcd, monitor, lcd and monitor).