Lenovo Z580, can't turn on tge WiFi adapter

Hi! I have a problem with WiFi of my laptop Z580...
2 days ago I disconnect the battery and the charger from laptop, and when I turn on again the PC I found a message at the boot
"System CMOS checksum bad - press F1 to continue or F2 to enter setup"
I press F1 and Windows 8 starts normally, but the date and clock was wrong and the WiFi adapter was turning Off!!!
I try all I think to turn on the WiFi, but I can't find on laptop a button or a keyboard button that make this!
The WiFi adapter (Broadcom 802.11n) are ok, because I mount it in another laptop and it works...
I have reinstalled Windows and have still the same problem..
When I start Windows resolving problem it says that I have to turning on the WiFi adapter by clicking a button on the laptop, but this button don't exist in this model!!
I try to check the Bios WiFi setting but all are ok...
Some one say to me that I have to find a way to turn it on and there is nothing of break!
Does anyone know what I can do??
Please help me, couse I'm going crazy!!
Thanks to all and sorry for my English..

Have change the cmos battery and nothing are change

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