How much less energy does a computer use on sleep?

I put my computer to sleep so it won't use as much energy as it does when it's up and running all the time, but sometimes I wake it from sleep mode and I no longer have sound. The only thing that brings the sound back is completely restarting the computer...

I used to use iTunes since I had an iPod, but now I have a Sansa and I use Windows Media Player. But I've noticed that if I have WMP on, my computer won't go into sleep/energy saver mode. The screensaver doen't pop-up or anything. But if WMP isn't on...

My computer takes on average 5min to completely start and ready to use. But if i put it to sleep instead of shutting down, it takes between 10-15sec to ready to use when i put it on again. I would like to know the demerits of taken chances of this shortcut...

For example, font and graphics on a printed book use up ink, which is a resourse and costs money. Mailing a physical letter uses up the Mailman's gasoline and uses resources and costs money. Does text on a computer screen use up energy or resources?...

I have a dell desktop computer that is not that old, I was running a 23 inch monitor to it but wanted something bigger and I noticed on the back of my computer was an HDMI output so I bought a 42" HDTV and pluged the HDMI from the computer to the...

My computer was left on sleep mode last night and when I went to use it this morning the screen was black and so I tried to re-start and nothing. After about an hour I used the computer with just using the battery it did come on but when I went to use...

I am supposed to measure my energy use during an entire week for a project and I was wondering if the energy use of a cellphone is the entire time that it's plugged in or just the time it takes for the battery to be fully charged?

I have a Gateway 2000 Vivitron 17 computer monitor purchased in 1995. It still works but I wonder if the energy use is much higher than the updated flat screen monitors. I was thinking of purchasing a 22" flat screen monitor for my computer to replace...

id like to keep my electric bill down, does the computer use more energy starting up, or does it use more if left running and shut down every once and a while?