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Windows 7 on Lenovo A70 thinkcentre - Display problems

I have a Lenovo A70 running W7Pro.  The display shuts off as though it's going into sleep mode.  But, it doesn't wake up.  The customer replaced the monitor thinking it was a bad monitor.

I'm thinking it's the video card and I'm wondering what your thoughts are?

Thanks,
Craig
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JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
Here is the Driver Update page for that machine type:

http://support.lenovo.com/en_US/research/hints-or-tips/detail.page?&LegacyDocID=MIGR-75588

Get the latest Video Driver there.

Also, see if it has System Update installed (Control Panel) and run that to update drivers.

.... Thinkpads_User
Top Expert 2012

Commented:
That certainly sounds plausible.  Just to be thorough, you will probably want to double-check and see if there are any unusual entries in the Windows event logs right around the time that it happens.
Topic Advisor
Most Valuable Expert 2016
Commented:
Can you still access your machine using remote desktop (RDP) once the display is shut off? Does the system still work?
Distinguished Expert 2019

Commented:
>>  The display shuts off as though it's going into sleep mode  <<  when does this happen?
did hyou test with an external monitor?
you can also test by running from a bootable cd : ftp://ftp.gwdg.de/pub/linux/knoppix/KNOPPIX_V6.7.0CD-2011-08-01-EN.iso 
Most Valuable Expert 2013
Commented:
If it is behaving normally, just not waking after hibernation check the BIOS version is at least version 9CKT08A.

There should also be BIOS options for mouse/keyboard to be used as "Wake from Sleep" devices but  also check the Windows power management settings and the settings in Lenovo's HotKey controls which also control what devices can be used to wake the laptop.

Author

Commented:
Wish it was a laptop ...it's a sff desktop
Most Valuable Expert 2013
Commented:
^^ applies to both :)  The BIOS is the A70
Distinguished Expert 2019

Commented:
did you test with a bootable cd?  that will show if it is bad
you can also test with another video card

Author

Commented:
Wow...what a drag:

First, they had a bad monitor....I think the line voltage was too low and the video card wasn't picking it up?  Switching it to a laptop and then back at least woke up the display.  I updated the BIOS as recommended.

So, they bought a new monitor.  Same problem with no display that worked on the laptop with no problem.  So, I switch it back and to the A70 and this time tighten down the thumb screws and Viola!!!!! We have display on the A70!

Thanks everyone for your help.

Author

Commented:
Wow...what a drag (reposting in the solution)

First, they had a bad monitor....I think the line voltage was too low and the video card wasn't picking it up?  Switching it to a laptop and then back at least woke up the display.  I updated the BIOS as recommended.

So, they bought a new monitor.  Same problem with no display that worked on the laptop with no problem.  So, I switch it back and to the A70 and this time tighten down the thumb screws and Viola!!!!! We have display on the A70!

Thanks everyone for your help.