If you have ATX Main Board, ATX case Award Bios, or any Bios that supports PS/2 Mouse Power On, then you can power on your computer with a double click.
To activate this feature:
1. Restart your computer
2. Then press Del when the BIOS message appears to enter your CMOS configuration. (For some computers you must press F1 once as soon as you see the first black page with white writing).
3. Select Integrated Peripherals from main menu
4. If PS/2 mouse power on disabled, activate it by press page up/ page down key it will became Double-Click
5. Press Esc key to exit
6. Press F10 to save and exit Power off your PC
7. Now double-click the left mouse button,.. Your PC will turn on.
(This trick was Submitted on 11/9/99 in the site where I found it. So, it seems that it works better for the old "Mother-Board" models.
I tried it on mine, it didn't work. I didn't find the option of "PS/2 mouse power" on mine. But I tried all other options there, none of them worked.
It might be very interesting if one of our techies knows the way for that functionality to tell us how to do. Thanks... )