How to turn on screen saver

http://www.nvidiageforcerepair.com/samsung-laptop-nvidia-repair.htm It is a video card malfunction

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it goes into power saver mode.just press the power button on the console to get it back.don't turn on/off machine

Great presentation of your problem.
One thing I would check is the screen saver. You say as long as you use the computer it looks normal. Look at your screen saver settings to see if the lined appearing coincide with the screen saver time.
With computer parts, failure on a periodic basis (based on time) usually indicated a heat problem. This does not appear to be the problem in your case, as you say you can use the computer for an extended period without a problem. This is why I was suggesting a screen saver problem. You might even try a different screen saver just to test this. Possibly the part of windows that controls the screen saver (and don't ask me where that is, 'cause I haven't a clue) is corrupt.

Good luck.

Welcome to FixYa.

There is no way to turn off the screen saver of Nokia n97 mini. The best thing that you can do is to choose another screen saver that you like.

To modify settings for automatic screen and key locking, select Menu > Settings and Phone > Phone mgmt. > Auto. keyguard.

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Jas247

Unless you have already done so, check the power saver options in the control panel. You may have to tweek the timings to make sure power save options are not cutting in too early.

I don't know which windows operating system you are using but generally you will find the details in the Control Panel.

To set a screensaver with 3D text on a Windows computer please reference the guide: http://books.google.com/books?id=c4m8wix-lR0C&lpg=PA87&ots=eg8Q7Kdy5C&dq=windows%203d%20text%20screensaver%20guide&pg=PA86#v=onepage&q&f=false.

you can make your monitor didn't go sleep from screen saver window select advanced and change option to never

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Press the Windows key + P on your laptop.
Or, if that doesn't work, look on your F keys for something that looks similar to a monitor.
Press the FN key and that key.
This should bring up your laptop's display on the tv.

Screen saver is on your computer.