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jmwileyms
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Registered: ‎04-12-2016
Location: US
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Message 1 of 9

C40-05 Firmware Update Failed and Machine won't boot

I took a firmware update downloaded from Windows Update. The machine shutdown and began flashing the bios. It then restarted and now does not boot at all. It does not even get to the BIOS. It simply restarts and goes to a black screen with no messages or failures.

 

Is there  a way to flash the BIOS and/or Firmware from a USB key or DVD?

 

Regards,

J.M. Wiley

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Message 2 of 9

Re: C40-05 Firmware Update Failed and Machine won't boot

Welcome to the Lenovo Community !

 

Sorry to hear of the problem you are having.  Are you sure you got a BIOS Update from Windows Update?  If you did, that is a scary thought.  Windows 10 is good for giving you OS and driver updates whether you want them or not. Giving a BIOS Update is kind of over stepping their bounds IMHO.

 

Have you tried this.....


1. Unplug the charger / adapter.
2. Press and hold the Power Button for 15 seconds.
3. Plug in and power up the system to see if the problem was resolved.

 

If that didn't correct the problem, can you access the BIOS Setup by repeatedly tapping the F1 key when you first power up the computer.  If you can access the BIOS Setup then your problem is most likely an operating system problem with a driver update Microsoft gave you. 



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amhoenig
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Message 3 of 9

Re: C40-05 Firmware Update Failed and Machine won't boot

What if I can't access BIOS?
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Message 4 of 9

Re: C40-05 Firmware Update Failed and Machine won't boot

Welcome to the Lenovo Community amhoenig !

 

I assume that the computer is completely unbootable and you that is the reason you can not access the BIOS.  In that case, depending on the model you have, you can try disconnecting the CMOS battery on the motherboard with the computer unplugged from the wall.  Then press and hold the power button for 15 seconds, reinstall the CMOS battery and try powering on the computer to see if the problem is resolved.



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amhoenig
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Message 5 of 9

Re: C40-05 Firmware Update Failed and Machine won't boot

This did not resolve to problem. The macine still won't boot and I cannot access BIOS.
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Message 6 of 9

Re: C40-05 Firmware Update Failed and Machine won't boot

Do you get anything showing on the screen?  If yes, have you tried disconnecting the hard drive and optical drive to see if that will trigger a prompt to access the BIOS?  If no, the faulty BIOS update may have well corrupted the motherboard. 



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amhoenig
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Message 7 of 9

Re: C40-05 Firmware Update Failed and Machine won't boot

I am not getting anything to show on the screen and I have tried disconnecting everything from the motherboard including the CMOS battery and nothing works.  The screen remianes blank when I try to boot each time.  Thanks for the advice.

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Message 8 of 9

Re: C40-05 Firmware Update Failed and Machine won't boot

With the hard drive plugged in is the computer showing any kind of activity?  If there is hard drive activity, try using an external display.  Possibly the computer is working, but the screen display isn't.  If there is no hard drive activity then the BIOS update may have corrupted the BIOS.  If that is the case then the only solution is to replace the motherboard.  Also be sure when trouble shooting the system to have all USB devices unplugged just to be sure a faulty device isn't preventing boot up.



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Message 9 of 9
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Stuck on Lenovo screen after a Windows Update.

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