Toshiba Qosmio X875-Q7190 User Guide - Page 150

150 If Something Goes Wrong Wireless networking problems error messages - these will be very helpful if you should confer with a support technician at a later time. NOTE To enable or disable wireless communication, use the F12 key. For more information see "Disabling or enabling wireless devices" on page 164. ❖ Use IPCONFIG to verify that the computer has a useful IP address - one other than the private address of 169.254.xxx.xxx assigned by Windows®. 1 From the Start screen, type Cmd. 2 Click Command Prompt. 3 Enter IPCONFIG/ALL, and then press ENTER. The IP address for each active network adapter will be displayed. ❖ Connect your computer directly to your router or broadband modem, by plugging a standard CAT5 Ethernet patch cable (sold separately) into your computer's RJ45 Ethernet port. If your connection problem disappears, the problem lies in the Wi-Fi® part of your network. ❖ If you have enabled any security provisions (closed system, MAC address filtering, Wired Equivalent Privacy [WEP], etc.), check the access point vendor's Web site for recent firmware upgrades. Problems with WEP keys, in particular, are frequently addressed in new firmware releases. The Windows® operating system wireless management utility does not work. If you are using an external Wi-Fi® adapter (a USB adapter, or other variety), check if the adapter comes with its own management utility. If it does, the utility may be disabling the Windows® operating system wireless management utility, in which case you must use the adapter's management utility. If the documentation that accompanies the adapter does not provide enough information to determine if this is the case, contact that vendor's support group for further advice.