LCD Loses Signal but CRT Finds It


  1. BigApeLikeThing
    Posts : 2
    Windows 7 Pro
       New #1

    LCD Loses Signal but CRT Finds It


    Hi All,

    Just upgraded my system to Win7 Pro, with new mobo, cpu & ram.

    During final installation of windows the monitor kept losing signal. If I unplugged LCD from graphics card, and plugged in an old CRT, the picture was there.

    After a minute I could unplug the CRT and put the LCD back on and it would work.

    This happens when changing user, booting up (at Window’s login page) and often when installing software.

    The graphics card was fine in XP, this has only happened since installing Win7, which was yesterday..

    I have turned off any sleep and power saving settings in Windows. I have the latest Nvidia drivers for my GTX275.

    Grateful for any help,

    Ape
      My Computer
    Quote Quote

  3. bobkn
    Posts : 2,606
    Windows 7 Pro X64 SP1
       New #2

    Can you boot into safe mode (F8)? At a guess, your graphics adapter is et to a mode that your LCD does not support. (CRTs have limitations, but multisync ones can be quite flexible.) If it boots into safe mode, change the display settings to supported ones (60 Hz refresh).
    Last edited by bobkn; 03 Apr 2011 at 16:43. Reason: typo
      My Computer
    Quote Quote

  4. BigApeLikeThing
    Posts : 2
    Windows 7 Pro
    Thread Starter
       New #3

    Thanks bobkn,

    I will try this tonight.

    I can use the LCD, but only intermittently. I checked the settings when the LCD was and it was on 70Hz (or maybe 75) and couldn't be changed.

    I also checked the settings when the CRT was displayed and it was set to 60Hz.

    The issue often goes like this.

    All ok
    Change user or other event
    Display goes blank
    Signal Lost
    Unplug LCD
    Plug in CRT
    Signal is there
    Unplug CRT
    Plug in LCD
    Signal is there too, for a while, until the next event.

    I left PC on last night, all night and LCD was still on ok this morning. It seems to be when Windows re-evaluates the display, I ignorantly guess.
      My Computer
    Quote Quote

 

  Related Discussions
I use the laptops bulitin NIC to reach the Internet, and then i added a usb wifi adapter to reach my security cameras. Unfortunately after a few days the Connection to the Internet through the built in NIC is lost. I have noticed a Solution that if I use a Proxy in the Webbrowser that , the...
Hey guys. So, everything was working just fine until this very morning. No headaches whatsoever. So, this morning I turn on my monitor and receive a "HDMI No Signal" from my monitor. Thing is that, 8 hours prior, it was working just fine. So, here's what I've done. * Monitor was connected...
When I start my computer with drivers installed my monitor loses the signal when I should be receiving a log in screen. I can boot up fine in safemode and/or if I'm using Standard VGA Graphics Adapter. To my knowledge I do not have an onboard graphics card as there is nothing to plug an avi or vga...
HP Pavilion Elite HPE-170t CTO Desktop PC HP 2509M Monitor connected with HDMI cable Windows 7 64-bit   I bought this pc from HP in 2010. It ran perfectly until i got a virus a few months back and lost both hard drives due to corruption and had to start from scratch. I had a local...
Now before you all link me to other places with the same problem, mine is a little different. I turn on the computer, goes past the bios screen as normal, does the windows loading screen as normal, then the screen goes black and the "No Signal" message is displayed. Now, here is why it is...
Our Sites
Site Links
About Us
Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

 © Designer Media Ltd
All times are GMT -5. The time now is 02:34.
Find Us