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What's DOS?
Posts: 1
Registered: ‎03-23-2014
Location: Ireland
Views: 2,270
Message 1 of 2

Lenovo c200 all in one desktop windows 7 issue blank screen



i had to format the machine because she was running slow

it wasnt the original installation cd (windows 7 home) but its deffo windows 7 home because then the key wouldnt work

anyway right


it installed fine. everything worked up until i installed the windows updates. i then rebooted

now when it boots to the windows logo the screen goes blank but i can hear the login sound and then nothing


Iv stuck in the windows recovery and did a restore and attempted to fix whatever problems it had but nothing.


could there be a loose wire inside?

should i open her up ?



Social Support Agent
Social Support Agent
Posts: 5,822
Registered: ‎02-11-2012
Location: PH
Views: 2,245
Message 2 of 2

Re: Lenovo c200 all in one desktop windows 7 issue blank screen

hi neilodmt,


Welcome to the Forums.


Looking at the Windows 7 Boot Process, the OS loads up the necessary dependencies, drivers, and system registry hive as soon as the Windows 7 logo appears.


it's possible that during the Windows Update, the system installed a display driver or an update to the system files that's causing the black screen issue. If you're able to see a display during POST / Windows Recovery then there's no need to open up the machine.


To isolate, can you try one of the following:

1. Boot in Safe Mode (Windows will be forced to use a generic display driver). if this works:

  a. Open Device Manager > Display Adapters > (right click) on the display device > choose Properties

  b. On the Display Properties, navigate to the Drivers Tab and click Rollback Driver then hit Apply > then Ok.

  c. Reboot the machine in normal mode and observe.


2. If you're using a Windows 7 Home Premium (without SP1), re-install the OS and temporarily disable Windows Update. When you get to the desktop, install Windows 7 Service pack 1. If successful, create a System Restore point and install the other updates from Windows Update.



Let me know how it goes.



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