How to turn on wireless network for aspire 4250

There is no physical switch (external). If you wireless is not working either the internal card is bad, it's turned off in the BIOS or you need to update the driver. If it's the driver it should show under "Device Manager". You will see an " ! " (Exclamation Point) beside it. Hope this helps.

Connecting your Acer laptop to your home wireless network is fairly simple.
Before you begin you need to know the SSID broadcast name (Wi-Fi) network name and security passphrase (Wi-Fi network password).

Move the Wi-Fi switch to the "On" position.
Not all models have this switch.

Open the Windows Start menu and select "Connect To."
A list of available connections will appear.

Select "All" from the drop-down menu to view all available networks and connections within range.

Select the desired network and click "Connect."
Enter the security passphrase if prompted and click "Connect" again to join the network and gain wireless Internet access.
http://en.kioskea.net/faq/294-wi-fi-wireless-configuration-for-your-laptop - for-acer-users
Windows 7 Acer AspireLaptop wireless

Wireless Internet is a convenient way to hook up multiple computers to one router without the mess of cords.

The router or 2-in-one (router/modem combo), must be set up through your Internet Service Provider and connected with either a DSL line or Cable.

Since most Acer laptops have built-in wireless, no additional hardware is required. Turn on the laptop.

Move the switch located on the front of the laptop to the right, then let go.
The switch will go back to its original position.

Confirm that the wireless networking icon has appeared on the screen.

Right-click the wireless icon in the bottom right corner.

In Windows 7 this will resemble a small stair-step triangle; In Vista it looks like a tiny monitor.

Click "View available wireless networks."
It might also say "Open network and sharing center."

Wait while the adapter finds your wireless network.
Click to highlight the network and click the "Connect" button.

Enter the security password that you created when setting up the router (if applicable).
If you don't know or can't remember, log in to the gateway page specified in the user's guide.

Locate the "Wireless security" settings page to see if security is enabled.
If it is, type in a new key and enter the same number for the wireless network.


http://support.acer.com/acerpanam/notebook/0000/Acer/Aspire1300/Aspire1300faq27.shtml

The router or 2-in-one (router/modem combo), must be set up
through your Internet Service Provider and connected with either a DSL line or
Cable.

Since most Acer laptops have built-in wireless, no
additional hardware is required.

Turn on the laptop.

Move the switch located on the front of the laptop to the
right, then let go.


The switch will go back to its original position.





Confirm that the wireless networking icon has appeared on
the screen.

Right-click the wireless icon in the bottom right corner.

In Windows 7 this will resemble a small stair-step triangle;
In Vista it looks like a tiny monitor.

Click "View available wireless networks."


It might also say "Open network and sharing
center."

Wait while the adapter finds your wireless network.


Click to highlight the network and click the
"Connect" button.

Enter the security password that you created when setting up
the router (if applicable).


If you don't know or can't remember, log in to the gateway
page specified in the user's guide.

Locate the "Wireless security" settings page to
see if security is enabled.


If it is, type in a new key and enter the same
number for the wireless network.

see link below , if it is of no use please add more detail and resubmit the query



http://www.pctechbytes.com/acer/acer-aspire-system-recovery-partition/

Locate the Wireless LAN switch located on the front of your Acer Notebook.

Move the switch to the right to turn on Wireless connections.

Right-click the network icon located on the system tray next to the clock.

You should see a list of available wireless networks.

Select the network you want to connect to and click "Connect."

or

Power on the Acer Aspire laptop.

Right-click the wireless Internet icon in the lower right corner of the desktop.

Select "Enable" from the pull-down menu.

Right-click the wireless icon again.

Select to view all available wireless networks in the area.

Momentarily a window appears with all of the available Wi-Fi networks.

Select the Wi-Fi network you want to connect to, then type in the password (if required).

Click "Connect," and your Acer Aspire computer connects to the Internet.

hope this helps

The wireless feature (Wireless LAN) on an Acer notebook allows you to connect to available networks. This convenience allows you to use the Internet with network cables, modems or network installation. Acer laptops come with a wireless switch to turn the wireless feature on or off. Once you enable the wireless feature, your Acer notebook can connect to wireless networks within range.

Instructions:
1.Locate the Wireless LAN switch located on the front of your Acer Notebook. Move the switch to the right to turn on Wireless connections.

2.Right-click the network icon located on the system tray next to the clock. You should see a list of available wireless networks.

3.Select the network you want to connect to and click "Connect."

The wireless feature (Wireless LAN) on an Acer notebook allows you to connect to available networks. This convenience allows you to use the Internet with network cables, modems or network installation. Acer laptops come with a wireless switch to turn the wireless feature on or off. Once you enable the wireless feature, your Acer notebook can connect to wireless networks within range.


Follow these Instructions

Locate the Wireless LAN switch located on the front of your Acer Notebook. Move the switch to the right to turn on Wireless connections.

Right-click the network icon located on the system tray next to the clock. You should see a list of available wireless networks.

Select the network you want to connect to and click "Connect."

Hi, Inorder to turn on the wireless switch on the Aspire 3680 laptop you would need to slide the wireless switch in the front of the laptop to the right that would turn on the wireless switch;you could also refer to the user manual for getting the exact position of the wireless switch by clicking on the below link:-
http://global-download.acer.com/GDFiles/Document/User%20Manual/Prespa%20AS%20ENG_Starter_OLM.zip?acerid=633646662894100968&Step1=Notebook&Step2=Aspire&Step3=Aspire%203680&OS=V10&LC=en&BC=Acer&SC=PA_7
In the user manual please go over to the page:-36 to view the picture with the wireless switch.
Thank you for your time and best wishes for your effort.

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· 2 Power on your laptop computer, if it is not already turned on.

· 3 Press the "Fn" and "F2" keys simultaneously to turn on the wireless connectivity option for your Acer Aspire One. You may need to press these keys several times until the light above the wireless symbol glows orange.

· 4 Click the "Wireless Network Icon" in the system tray at the lower right corner of the screen. This icon looks like a computer with semi-circles next to it.

· 5 Select the SSID of the wireless network that you wish to connect to, then click the "Connect" button.

· 6 Type the security key for the wireless network when prompted, then click "Connect."

To go wireless:

1.- check if your wireless device is working
2.- If not you have to turn it on
3.- Select your wireless network (control panel>>network connections>>wireless networks)
4.- Connect to the network (is the network is pass protected you will prompt for a password)

If above doesn't help, please describe better your issue