nothing appears when typing

[s660117]

Hi,
I awoke this morning to find that nothing appears on the monitor when I type. This happens across all applications. I substituted a wired keyboard for my Logitech wireless and got the same result. The strange thing is that if I open Notepad, for example, type something in and go to exit Notepad it prompts me to save what I've entered even though nothing appears on the screen. The only thing I haven't tried is swapping monitors.
I am running Windows 7 SP1 on a Dell Inspiron desktop.
Any help would be appreciated.
Thanks,
s660117

 

[Victor S]

I'm assuming you rebooted after swapping keyboards.
Do any function keys work? Space bar, etc?
The only time I've encountered non-operative keyboards was with a brand new ABIT motherboard.
It was my first computer build. Sent the MB back and the replacement worked fine.
Apparently had a bad keyboard controller.
Got no diagnostic messages at all upon booting, but 2 known good keyboards wouldn't input to the PC.
Hope that's not your problem, but it's all I have.

 

[Mellon Head]

Just to be clear, with the Notepad example, it's like your font has become transparent? Can you see the cursor in Notepad?

 

[s660117]

Thanks for the replies.
No, I could not see the cursor.
But because I had immediate need of the computer, I restored my C: drive from a backup and the problem went away.
Thinking back, I thought that the issue arose when I received an update for my USB, but I have since re-received what was presumably the same update without ill effect.

 

[Mellon Head]

It's too bad that you had to go through the nuisance of restoring the HD, but I'm glad that you got it fixed.