Recently, I've upgraded my CPU, Mobo, RAM, and Graphics on my computer. After the upgrade, my monitor won't shut off in either Vista or XP. Even when I turn the computer off, the monitor doesn't shut off. The monitor just displays the "no signal" message. Could I have a bad graphics card? I updated my drivers to the newest ones but it didn't solve it. I am using the same monitor prior to upgrading and I had no problems until after the upgrade.

Monitor: Hanns-G HG281D
Graphics: eVga 9600GT

Then won't it be the monitors problem? Something wrong with the turn on/off button?

Have you thought about pressing the power button? And I don't think it's a problem on the computer side.

Connect the monitor to the computer's power surge. That way when you turn off the power surge everything is off.

Did you accidently change any of the auto power-off settings in the monitors menu? On my Samsung, you have the option to set how long the monitor stays on before powering down. If it is displaying "no-signal", the problem is with the monitor somewhere.

Let me be clear about a couple things I left out:

After the computer shuts off, my monitor displays the "no signal" message. I can still turn the monitor off manually by pressing the button.

It's the same in windows. When my monitor is scheduled to turn off (have screen saver at 5 min and monitor power off at 20 min) it just displays the "no signal" message. I can still turn the monitor off manually by pressing the button.

I went through the monitor's menu to look for any auto settings but did not find any. I reset to the factory's setting, but it still does it.

When the monitor is hooked up to another computer, the monitor functions correctly.

Because of these symptoms, I believe its a graphics card problem. I just don't know if it's hardware or software. I'm thinking that the signal to shut the monitor off isn't happening? Usually when then monitor reads "no signal" message, is it in the monitor's internal software that tells it to shut off the monitor?

I will troubleshoot by hooking another monitor up to my computer to see if the same problem happens. I'll update the results of that later today after I get a hold of another monitor.

Please share more ideas. Thanks.

Try a different screensaver.

When you turn it off, it is normal for it to show "no signal" after a short while.

Check your mobo's power settings. Some allow you to change your monitor's sleep state. Change the DPMS state to anything but "normal".

I think this is the closest to solving my problem. I troubleshooted a little more. I unplugged the video cable (i'm using HDMI) from the monitor and it displays the "no signal" for about 5 seconds and then goes powers off (standby) like normal. So i'm thinking it does have to do with a motherboard setting.

I've been looking through my manual and the BIOS for a DPMS option or something similar but can't find anything related. If anyone can shed some light it would be appreciated. My motherboard is the Gigabyte GA-P35-DS3L. Maybe a bios flash would solve the problem? I'll wait on more suggestions before going that route.

I tested another monitor on my computer and the same thing happens. So I can count out the monitor for being at fault. Now it's down to either a setting in my BIOS, or a bad graphics card. Anyone want to chime in some ideas? I'm going to flash my BIOS to the latest version to see if it clears it up.

I just wanted to update everyone in hopes to get any more suggestions.

I went ahead and updated the BIOS to the latest for my mobo. Still getting the same symptoms. I figured the mobo might have been polling the monitor but seems like it wasn't because of the old BIOS. If it is, I can't find any settings in the BIOS. I'm wondering if it's a bad graphics card. I'll have to wait until someone lends me theirs to test.

Again, any other ideas, please post and help!! It's irritating to lean and shut off the monitor every time I leave my PC!!

I Have same problem (hardware:Monitor: Hanns-G HG281D,Graphics:EVGA 9600GT ,vista 32 bit)

I have the same monitor, same issue. I have two of these monitors and the menu buttons are on the side, which makes it a pain to manually power down with the monitors side by side.

I'm using the HDMI to DVI cable rather than VGA - beginning to wonder if that has anything to do with it (not sure why it would but I'm willing to try whatever). I'll test that soon and report back.


OS: Vista 64 bit - SP1
Monitor: Hanns·G HG-281DPB Black 28" 3ms Widescreen
Video Card: GeForce 8800GS
Motherboard: ASUS P5K PRO LGA 775 Intel P35

WOW! Fixed!!

So today I plugged up the left monitor with VGA (left the other using HDMI), set the monitors to power off in 1 minute in Vista, BAM. They BOTH turned off like they were supposed to. That is a first on this system using these monitors.

Hope that helps some folks out there!

EDIT: Upon a second test, only the left (VGA connected) monitor is shutting off. I guess that means I'm going to go with VGA on both monitors.