Asus 802.11g wi-fi only detects network when connect a cable to the external antenna. what should i do?

Could be a corrupt Wi-Fi receiver module, before you rip it apart if it’s not under warranty.
Buy an external USB Wi-Fi adapter and insert it into the TV see if that resolves the issue.
Unless your an electronic geek or you have the electrical diagram you really won’t know what the WiFi unit looks like or if it’s even a detachable board. It maybe built into the entire circuit.

You can buy a 'repeater'. A repeater is a net device that can pick up your wifi signal from one wifi, and using another channel (your computer or other device can automatically change channels) it will also send the same connection without wires. Basically, these are like cell towers in that you can move from one to another seamlessly, if they're built to do so. Some cheaper models will require you to chose the one you want.

The other option is to use the etherport, and run another wireless router by pulling a cable to the part of the house or buisness where you need the signal.

Now, that's the easiest way. However, if your wifi uses an antenna, sometimes, if you can find one, you can get a better antenna, something that is directional, or partly directional, this can at times double or triple your distance. However, unless the antenna has an amplifier, it will merely have the same signal, it will just confine the directions it travels, and this boosts the signal. Most normal antennas transmit 360°, but you can get them with any angle spread, and it will help, even down to 15°, which is a very narrow but strong signal. Add an amplifier, and you increase the output signal.

Hope this helps.

try to connect via lan cable.if u get online then look for wifi switch !

Wi-Fi provides wireless Internet access over distances of up to 100 meters (00 feet).

To use Wi-Fi on your phone, you need access to a wireless access point or "hotspot". The availability
and range of the Wi-Fi signal depends on the number, infrastructure, and other objects
through which the signal passes.

Turning Wi-Fi on and connecting to a wireless network
From the Home screen, press MENU, and then tap Settings > Wireless & networks.
Select the Wi-Fi check box to turn Wi-Fi on. The phone then scans for available wireless
networks.

Tap Wi-Fi settings. The network names and security settings of detected Wi-Fi networks
are displayed in the Wi-Fi networks section.
If the wireless network you want to connect to is not in the list of detected networks,
scroll down the screen, and then tap Add Wi-Fi network. Enter the wireless network
settings, and then tap Save.

Tap the Wi-Fi network you want to connect to.
If you selected an open network, you will be automatically connected to the network.
If you selected a network that is secured with WEP, enter the key and then tap
Connect.

Depending on the network type and its security settings, you may also need to enter more information
or choose a security certificate.
When your phone is connected to a wireless network, the Wi-Fi icon appears in the
status bar and tells you the approximate signal strength (number of bands that light up).
The next time your phone connects to a previously accessed secured wireless network, you
will not be prompted to enter the key or other security information again, unless you reset
your phone to its factory default settings.

From the Home screen, press the Menu button.
Select Settings, and then select view next to Wi-Fi Settings.
In the list of detected networks, choose a network to connect to it.
If your Wi-Fi network and router support WPS (Wi-Fi Protected Setup), your Kindle will detect it.
If you don't see your network in the list, you need to add the network manually.
If the network is protected by a password or WPS (Wi-Fi Protected Setup), enter the password and then select Submit.If you don't know the Wi-Fi network password, contact the person who set up the Wi-Fi network.After you connect to a Wi-Fi network, your Kindle automatically connects to it again whenever that network is in range. If more than one network is in range, your Kindle automatically connects to the last network used.

Hello Derek,

Connecting Wi-Fi in HTC Desire Cell Phone

From the Home screen, press , and then tap Settings > Wireless & networks.Select the Wi-Fi check box to turn Wi-Fi on. The phone then scans for available wireless networks.Tap Wi-Fi settings. The network names and security settings of detected Wi-Fi networks are displayed in the Wi-Fi networks section.If the wireless network you want to connect to is not in the list of detected networks, scroll down the screen, and then tap Add Wi-Fi network. Enter the wireless network settings, and then tap Save.Tap the Wi-Fi network you want to connect to. If you selected an open network, you will be automatically connected to the network. If you selected a network that is secured with WEP, enter the key and then tap Connect.

You must have internet service, example an anything data plan. Then all you do is tap on the internet ball and it conects.

try this:
connecting to an open network
1 press wi-fi on the side of your smartphone
if it says Wi-Fi is on your phone will detect available networks.if your device does not auto connect and configure wireless networks screen appears highlight the network you wamt and press connect

1. First look for the Wi-Fi (Wireless) Switch on the Laptop (it may be on the front or sides of your laptop) [It's symbol will be like a 'Tower' or 'Antenna').

2. Turn it to ON position (a red or blue light will blink).

3. Now, switch ON your Wi-Fi router modem provided by your network operator (also check the connecting wires between router and phone jack).

4. System will automatically detect the network.

5. If not seach your Wi-F- network through :
Start -> Connet To ->Search/Refresh (a list of services will come).

if it helps tell me...tc! :)