HI - I have hooked up a TV as my desktop monitor. Right now, it only turns off and on by the TV's remote control. Is there a set up which will have it respond to the computer's on/off/sleep-wake status?  
 
Thanks ! 

My guess is that would depend on the software running the TV, so you'd have to look at the manual.

An option would be search for a USB IR Transceiver.  There are a few out there, but from what i've seen it may require a bit of work to get it going.  Something like this along with a software like eventghost may get what you're looking for.  For me, having been through some of this mess in the past, I'd keep the remote handy. Lol. Like Beagle mentioned, I'd look first at the TV options to see if there was a setting that would cause it to come on when receiving a signal.  Good luck.

Interested to know as well. I'm using a 39" Samsung LCD TV.
 
I played around with the TV menu just now, the closest I found is an option to shut off the power 15 mins (range from 15 mins to 4 hours) after receiving no signal from any source. In my case it's under the TV's Menu - Eco setting.
 
I suppose by design, the TV won't want to shut down immediately as you may be changing source input from time to time.
 
Edit : you do need to power up the TV with the remote manually. 

A minor hijack here...
I've been considering a TV for a monitor, how does the quality compare to current LCD monitors?

Works great! You actually pay less (relatively) for a bigger screen if space allows. Except the menu difference (actually better, cause you've got a remote).. they are just bigger LED / LCD.
 
Go for the full HD 1080p ones (most 39" and above are).. and not the 720p.

I have used HDTV's for multiple years now, with great pleasure.  I am currently using a 32" and a 40", and would not even think about going back to regular computer-purposed monitors.
 
Brand new 32" HDTV's can be had these days for $199 or less, for pretty good ones, and the 40" one I am using cost me only $219.
 
It is true that the old-school computer-purposed displays have a bit finer display, but I don't find any readability issues at all when running my computer through an HDTV.  I happen to use the 32" HDTV as my primary computer display, and the other one is usually used as  2nd one when running Sonar, but otherwise is used as an HDTV.
 
An added bonus is that if you run an HDTV as your primary computer display, you can also route your Windows Default Audio Device to be that HDTV, since it has its own speakers and the audio is sent through the HDMI cables along with video.  That makes it easy to hear YouTube videos or whatever through the HDTV, while my audio interface is reserved for Sonar (or other stand-alone synths and such)
 
Bob Bone
 

robert_e_bone
An added bonus is that if you run an HDTV as your primary computer display, you can also route your Windows Default Audio Device to be that HDTV, since it has its own speakers and the audio is sent through the HDMI cables along with video.  That makes it easy to hear YouTube videos or whatever through the HDTV, while my audio interface is reserved for Sonar (or other stand-alone synths and such)
 
Bob Bone

Since this thread has died down, I have a question.
Is it possible to route audio from Sonar to HDMI?
 

JohnoL

robert_e_bone
An added bonus is that if you run an HDTV as your primary computer display, you can also route your Windows Default Audio Device to be that HDTV, since it has its own speakers and the audio is sent through the HDMI cables along with video.  That makes it easy to hear YouTube videos or whatever through the HDTV, while my audio interface is reserved for Sonar (or other stand-alone synths and such)
 
Bob Bone

Since this thread has died down, I have a question.
Is it possible to route audio from Sonar to HDMI?
 

I think you'd need a soundcard with HDMI output to do that - in other words, not a "recording" soundcard, but an AV soundcard, such as the MOTU HD Express.   http://www.motu.com/video-products/hd-express-hdmi

Search around on that one, as I recall some having issues with playback on HDMI. Most graphics cards have HDMI out as well, but the driver mode required will most likely not be optimal (nor the speakers typically).