IdeaPad Y400& Y500 Win8 wireless limited problem operation guide

Description:
Use Y400/Y500, pre-installed windows 8 system, connect home router AP, high probability of wireless limitation, unable to access the Internet In case, after the problem occurs, you need to reconnect WiFi. The network exclamation mark icon appears in the lower right corner. As shown below:

After analysis, the wireless network card configured by the user model is Broadcam 4313. This problem can be solved by changing the wireless network card properties. ,
NIC and router compatibility and Microsoft's latest window 8 operating system caused such problems, not the machine's hardware failure.
Operating steps:
Step 1: Turn off the automatic power saving option of the wireless network card
Click ;Device Manager>, select <;Wireless Network Card Properties", click “Power Management&rdquo The "Allow the computer to turn off this device to save power" option is removed, as shown below:

Step 2: Enable "Federal Information Processing Standard (FIPS) Compatible" Enhanced Network Compatibility
Right click on the connected AP signal and select “View Connection Properties"""Security”“Advanced Settings"
Check “Enable Federal Information Processing Standard (FIPS) Compatible> Without this option, it is recommended to change the encryption mode of the wireless router to AES encryption:

Step 3: Modify the compatibility mode of the wireless network card
Select “Device Manager”, right click "Wireless NIC Properties", click “Advanced", select “AP Compatibility Mode", set the value to <;More Compatibility";

Step 4: Optimize Windows 8 TCP configuration