Is there a WAY for a computer to turn on at a given time supplied by the user?

If this is possible, would the computer need to have any fans ACTIVE or can it do so from stand-by power?

Well if it's an older system with a hard switch to the PSU you could get one of those power socket timers.  I have some i use to turn on lights for my PLANTS in the basement for parts of the day  .I had that in mind as well, unfortunately, this is ATX and not AT.

However, ATX does possess options such as LAN Wakeup call.

Would I be able to have my Router send a datagram to my Network card and use LAN Wakeup call to turn on my computer?I would assume a computer that is off will not accept incoming packets because well...  it is off.  

I turned off one of my systems who's LED's on the NIC card stay lit once it is off.  I tried pinging it   (well it humored me anyway..).  The ping timed out.

Also my router did not recognize that the system was on the network once the system was turned off.http://www.madge.com/_assets/downloads/lsshelp8.0/LSSHelp/AdvFeat/WonLAN/WonLAN1.htmI have read through the information provided by you, Merlin.

However, it is not QUITE what I am searching. Is there no other way to have the computer power on at a certain time?After having to reset the CMOS I discovered an option called Resume by Wake Up.

Has anyone ever used this before and can they tell me if it works when the computer is turned off before I test it myself?It operates just like an alarm clock.......most electronic gear has this.......tv....videos......etc..on wake on lan ....a program called magic packet ........kept the lan connection ALIVE by sending packets to it.....So it's basically an alarm clock built into the BIOS?Yes......... ;)or if you have one of this>http://secure.idg.com.au/images/pcw/nvidia.jpgTo my eternal shame I do have Nvidia equipment.  

I set the Wake up option in the BIOS to 0800 and it woke up at that time. Works perfect.

Thanks for the information, Merlin.