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enable 48-bit LBA large-disk support in the registry: Start Registry Editor (Regedt32.exe). Locate and then click the following key in the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Atapi\Parameters On the Edit...
instead of only cleaning the heat sink, you need clean the keyboard as well, as this model is designed that take the air through keyboard!
this Lenovo offical fireware download page, it’s in Chinese. use google chrome translate the page, download the latest reliable version http://www.vibeui.com/vibeui/rom3?key=K50
connect the data cable to the computer first, you have to go to recovery mode first by holding: volume keys (UP and down) and the power...
take out the battery , leave the battery out for few seconds put the battery back don’t turn on your phone plug in the charger, charge...
check “network connection” deleted some unavailable connections
Some motherboard has problem with EIST,Disable Intel EIST CAN improve the PERFORMANCE.