Can anyone help me how to restore a screen resolution. I accidentally switch from 1024x768 to 1280x768.pixels?

Q: I'm using an Lcd hp L1720 and Pentium 4 Cpu 1.70GHz and 256MB of RAM..do i have to upgrade my RAM to what? My screen size is about 10 inch , which is now completely Black with a text info "OUT OF RANGE" at the center of the screen when i turn on my desktop..please help...i just finished read the manual and its use less..

A: If u run windows XP start in safe mode and change the resolution. If that doesn't work, plug some other monitor that supports 1280x268 pixels from there change the resolution. Normally monitors are designed to go back to previous resolution on pressing Esc key if "OUT OF RANGE" error occurs. But try with diffrent monitor to change the resolution

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