The source input changes by itself.

SOURCE: No DVi input, then computer goes to sleep

I have a new HP pavilion slimline with Vista......a 19 inch flatscreen monitor......I went nuts with it not connecting and saying no DVI input......

I tried something and so far it has worked 10 times in a row...

start out with puter and monitor off.......turn on monitor.......let it go to sleep....then turn on puter....

I have the puter that has the start button on top of it.....not too crazy about it.....

hope this works for you.........Judy in NY

SOURCE: Input Signal Out of Range

I have an HP 1730 LCD monitor on a Compaq Presario S5100 desktop PC running Windows XP, up to date on patches as of 2009 Feb 25. For no apparent reason, the "input signal out of range" error message started appearing when the machine switches from boot mode (which looks OK) to regular windows mode. (My configuration does not HAVE a "safe mode" boot, by the way, so the usual advice doesn't apply.) Was the fault in the monitor, or the computer?

Step 1: see whether the computer is actually booting or not. Result: Over the home LAN, I was still able to access the shared directory on the suspect machine. This is good.

Step 2: swap the LCD monitor for an old Compaq MV720 CRT monitor. Result: the monitor does not like the input signal (essentially, the out-of-range error by another name), so the video signal IS faulty.

Step 3: reboot the PC with the analog monitor still attached. Result: the system boots up just fine, so there's something wrong with the way the PC boots with the LCD.

Step 4: swap video cables (without rebooting). Result: the LCD displays the working desktop, so the LCD display is still good, but there's still something wrong with the handshake between the LCD and the PC during boot. But we still don't know whether the LCD monitor is failing to produce the right Plug-and-Play sequence, as it used to, or the PC is no longer correctly interpreting the PnP sequence, so it's mis-configuring the video signal for the monitor.

Step 5: Back everything up, like you always should have been. (Always the last step, after a computer failure. ;-) )

SOURCE: No DVi input, then computer goes to sleep

Hi publicworker,

I had a similar problem whereas my monitor went to sleep mode after a few minutes. I'm running an HP LP 2065 in dual mode with another HP flat screen. However, I did resolve the issue after resetting the output settings.

How to do that:

• right mouse click on the desktop
• select graphic options
• output to
• extended desktop

SOURCE: hp w1907 monitor not detecting vgi input from original HP x3122 computer

It sounds like your computer has been having some trouble for some time. My hunch is that there is nothing wrong with the monitor at all.

Usually, when you see this warning on the screen that there is no signal, the monitor is trying to tell you that it cannot talk to the computer. This means the computer either a.) will not boot or b.) your video card in the computer has stopped working.

Does your computer make all the usual noises when you start it up? Can you hear the hard drive clicking and the fans come on?

Have you reseated the video connection on the back of the tower?

My guess is that something was going out before and it is now gone. The first place I would look to diagnose this problem is the hard drive.

Hard drives fade to fail sometimes, and when they are fading, the entire computer becomes painfully slow.

Hope this helps
good luck
tony