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I have a 24" acer monitor that I was setting the display settings via computer, wwhen a box appeared in middle of screen(rest is black) and it read"input signal out of range, please selcet 1920x1200x 60hz for best performance. The problem is that now nothing works on monitor. I have tuned it off, along with computer, thinking it may reset, checke the cables, reattached them, tried different monitor(which is working fine) I am at a loss what to do. Help!!

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Your screen resolution is set incorrectly, boot up in either safe mode or VGA mode and change it from there.

Posted on May 27, 2009

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You might have set the dispay settings to high or too fast for the monitor! You should change the Display settings to match (if you still have the old monitor)! Otherwise, try set it in Safe Mode.
The speed of refreshing should not go over the specified 60Hz. You might had it set to above 70Hz at other resolution. Should update Display card driver and/or software too.

Posted on May 27, 2009

  • Patrick Kam May 27, 2009

    Once you have boot into Safe Mode and if the Display Settings cannot be changed, try registry hack:


    1. Open Registry Editor, (Start->Run..., regedit [Enter])

    2. Navigate to this "folder": HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Hardware Profiles\0001\System\CurrentControlSet\Control\VIDEO

    3. Expand the Folders until you see 4 digit numbered folders (you may have a few of these)

    4. Click on them and look for the binary key "DefaultSettings.VRefresh" on the right panel

    5. Double click the key and set it to value "3c" (Hexadecimal) or "60" in Decimal, click OK to apply

    6. Alternatively you can change the resolutions as well:
      DefaultSettings.XResolution = 780 (Hexadecimal) or 1920 (Decimal)
      DefaultSettings.YResolution = 4b0 (Hexadecimal) or 1200 (Decimal)

    7. Close Registry Editor and reboot PC. Hopefully you should be able to use it right away.

    If you think your display card is not able to produce such high resolution, try 1024x768 and ramp up from "Display Settings" under normal boot mode.

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