Monitor turns off after a second or two. Turned computer off last night...turned it back on this morning and worked fine for about an hour then turned back off

The problem need professional servicing. The problem is in the vertical display section.

Get in the habbit of turning off LCD monitors when not in use. First, save electric. Second, save your monitor as LCD will burn up faster than a CRT. As for your problem, I would assume it's burning out and/or about to burn out...overheating. I would shut the entire system down, let is sit for 5 minutes and reboot everything. If it still fails to strike properly, it is probably toast.

Check ur computer

Yes. Do not turn the monitor off by its power switch, let the computer do the work for you. Alot of times when people use the power switch to turn off the monitor, the computer sees that all of a sudden the monitor has been disconnected from the pc. when that happens the pc sees it as a device beimg unplugged and removes that certain device from the pc's list of things that should be connected, and when you turn it back on the pc sees it again and starts loading drivers for that new part(monitor)

Try taking on the back of the monitor and pulling the power plug all the way out of it for about five minutes and then plug it back in and restart the computer see if it solved it thanks

like i put in another solution, this is probably the capacitors on the power board in the screen :)
easy fix if your okay with opening it and you can solder :)
theres 4-8 capacitors usually on the board, check if any have residue on them, or are fat (not normal cylinder)

Set the Hrts to 60 in Display Properties in control panel

no signal indicates a couple things... i suspect your computer isn't even booting up. reboot the computer while tapping the F8 key.... you should see writing on the screen... boot to safe mode. after it sucessfully boots up... reboot again... should be fine.

Robert

also is that an add on video card ?

I had the same problem with an AOPEN 17' lcd that was left behind at a rental property... I plugged it into my dell dimmension 4400 in place of my old analog. It worked fine the fist night, and got up and when turned it on again it had the famed green blinking power light. I switched back to the analog, and just disappointed I plugged in the AOPEN to another power source, and power came on a steady red light. I plugged it back into the puta and it came on again. I have not turned the monitor off again for fear of the blinks, and has been working great for close to a week now. Hope it helps someone else out there. Richard

check your system unit to make sure the problem is not from the system unit

the signal stage and cable is more likely to have faults contact a local technician for confirmation