You can shut down a PC from the command line, which means you can run 
it from a batch file, and then use windows scheduler to run the batch 
file at a particular time with scheduler. Put this line in a text file

shutdown -s -f

and then save it as a .bat file. The -s switch means shutdown, 
default is 30 seconds, as opposed to restart, and the -f switch means 
force applications to close.  Make sure you tell your anti virus and 
software firewall that it is OK to run it. For more shutdown options 
bring up a command window and type shutdown /? at the prompt.

Of course, the five volt side or your power supply will still be hot 
unless you follow up with a timer that the power cord is plugged 
into. Shutdown the PC with the batch file at 10PM, and then follow up 
with a timer shutting off the power at 10:15.

  I am afraid you will have to use a timer on the monitor, as well, 
as there is no way to disconnect it, other the turning the monitors' 
switch off, or pulling the plug to turn it off. The reason you do not 
see a plug in the PS, for a monitor, like you did with AT power 
supplies is because ATX employs  a soft switch whereby the power gets 
turned on by a signal from the motherboard.

  However, the 5 volt line is always on, in a standby mode, to 
monitor for network turn on, or other ways to turn the device on. 
Unfortunately, this just wastes power for most users, which is why I 
always turn my PCs and monitors off from a  hard wired switch.

Another way might be if your UPS could operate as a timer, so one 
could use software from your UPS to shutdown the PC, and all devices 
plugged into it = a monitor.

Mark Rode
The Nospin Group


At 12:32 AM 4/24/2008, you wrote:
>On a Windows XP machine, with a single mains input socket
>and no mains output for a monitor, is it possible to set it
>up so that after a set period it is turned OFF?
>
>Not the options offered in "Power Options Properties" of
>"standby" or "hibernate" but a full OFF with no power going
>into the machine at all?
>
>I thought I remembered from
>some time ago, with a machine where the monitor was powered
>from an "extra" mains output socket on the back of the PC
>case, that there was an option for the whole system to turn
>off after a set period.
>
>Regards
>
>Tony
>Rutland, UK

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