Horizontal lines on screen

I don't know where to post this question, so started here.

Horizontal lines have started appearing on our Toshiba laptop (about four (4) years old). They start by shading (screen can still be seen through the lines, but very faintly) about one-quarter of the bottom of the screen and move slowly up until the screen is nearly covered.

Have tried everything including a complete hard drive erase and rewrite - nothing has worked.

Any suggestions would be appreciated. Thank you.

Hi I am not sure right now but I would see if any drivers need to be updated.

1. Clcik start...
2. Type: device manager...
3. update drivers.
4. view
5. show hidden devices

Now look for any yellow warning signs next to any drivers...

Thanks for the suggestion. We tried to do what you said, but we can't see any yellow by anything because the horizontal lines are now blocking three quarters of the screen. Actually, it is more like a window screen then lines. We can see through it, but cannot ready what we are seeing. Very frustrating.

Any more suggestions? We would appreciate any help with this problem. Thank you.

I am going to have richc46 look at this thread that way you can have more then one person trying to get you up and running. In the mean time I will continue to look for a cure for you.

Thank you.

Thank you Americancritic for all your help. My husband fixed the problem of crosshatch of lines on the screen. He was so frustrated that he just started trying things. He took out the memory cards, left them out for a bit and put them back in. Voila!! Lines are gone. We are happy.
Thank you again for your help.