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Cannot Access Lenovo G500s BIOS.. please help

2013-07-21, 14:14 PM

Hi all,


I recently bought Lenovo G500s laptop. Initially it came with DOS. So, i took up partioning the HDD for installing Windows 7. So i changed the boot order to USB drive. Partioned my HDD and went on to install Win 7 through USB Disk. But now it says "Missing Operating System" and i cannot access the system BIOS using the Function keys. I guess, i had also messed up UEFI/Legacy settings in BIOS earlier. But now i cannot access the BIOS at all.


Can anyone provide me solution to undo the same or reset the corrupt BIOS. Probably by uploading the G500s BIOS file, so that i can flash it in my laptop.


Thanks for the help in advance.


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Re: Cannot Access Lenovo G500s BIOS.. please help

2013-07-22, 19:53 PM

hi starfire1801,


Welcome to the Forums.


During boot-up, if pressing Fn+F2 does allow you to access the BIOS, can you try to:

1. Remove the AC adapter and battery then press the power button for 20secs.

2. Reconnect the AC adapter and press the OneKey Recovery button. If a menu appears, choose BIOS Setup.

3. If you get the same problem, download a free copy of Windows 8 Enterprise (90day trial) and install it on the system. When you get Windows 8 up and running, try accessing theBIOs via the UEFI Firmware Settings.



Hope this helps

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Re: Cannot Access Lenovo G500s BIOS.. please help

2014-09-12, 9:33 AM

I have disconnected my hdd cable but its whowing a error message regarding my cable error! till this situation, i did not get into bios even. Would you please tell me what could happened with? I have discussed a local technitian he told me this is a bios probelem. Please help what should I do. Thanks!


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Re: Cannot Access Lenovo G500s BIOS.. please help

2014-10-31, 17:57 PM

Still cannot access :(


No menu appears !!


Is there any other way to reset bios..?


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Barnaul, Russia

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Re: Cannot Access Lenovo G500s BIOS.. please help

2015-05-08, 8:38 AM

Thank you to show me how to enter G505 BIOS! :smileyhappy:


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Re: Cannot Access Lenovo G500s BIOS.. please help

2016-12-21, 10:25 AM

I did an old trick I use with several makes to get into bios. press (if req FN Key) and run your fingers along all fn keys. Worked with this and several other models. Also Dell and Toshiba makes

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