as good an idea this is, better yet if you have a strong enough psu (atleast 150w) write the monitor directly into it and your shutdown controller, this will shut down and boot the entire system toghether
- if you can best bet would be to use an extra cdrom or floppy connector coming out of the psu to power the screen (instead of splicing into the main atx connector to the mb)
-- reffering to the usb and touchscreen detection problem when screen shuts down before computer --