No display on external monitor


Well-Known Member
I have attached external monitor to laptop with HDMI to DVI cable
Display is not coming on monitor
there is a message on monitor "monitor is going to sleep"
Model is HP 20wd 19.5-inch Diagonal LED Backlit Monitor

I can see display when attached to another laptop
I am using Windows 8.1


Well-Known Member
Not an expert on windows, but I think your computer is set to a resolution which the monitor cannot use. Set your resolution on computer which is monitor supported and try again.
Or maybe you need to update your BIOS.
Does your video card support the resolution the monitor needs?


Well-Known Member
Monitor says recommended resolution
1600 x 900

laptop resolution is 1366 x 768

It used to work earlier with HDMI to DVI and HDMI to VGA ports


Well-Known Member
Dell INSPIRON 15 3537
Screen Resolution: 1366 x 768

HP 20WD 19.45-Inch LED Backlit Monitor
Resolution: 1600 x 900 pixels


Solve problems with Windows 8.1 not detecting secondary monitors
More often then not, issues like this one are caused by out-dated or faulty drivers. Of course, there can also be a hardware issue lurking somewhere, and these are usually harder (and more expensive) to fix. Having a multi-monitor array myself on a system which runs Windows 8.1, I have encountered a few issues myself, but luckily, nothing which involved hardware fails (this time at least).

Read Also: VLC Player to Soon Add Chromecast Support for Windows 8
The multiple monitor settings can be found by either pressing the Windows Key + P or by right clicking on your desktop and selecting “Screen Resolution“. From here, you can configure which monitors you use and how they are arranged. In this window you can see how many monitors Windows 8.1 is recognizing. If you see all of them, then it’s only a matter of switching them on and arranging them accordingly. (Tip: use the “Detect” option to see the order of your monitors).
Some possible fixes
In order to determine where the problem originated, we’ll be looking at software fixes and hardware tests which will tell you where the issue resides. Before we download or update anything, let’s get the obvious out of the way and run a few diagnostic tests:
  • Unplug the device, restart your system and plug it back in
  • If available, try using a different out put (DVI / HDMI / VGA)

Note: Windows 8.1 on some computers have problems sending analog signals via certain VGA cables. Try another cable or if possible, use a digital DVI, HDMI or DisplayPort

  • If possible, hook up your monitor to another system and see if it works at all. If it doesn’t, try a different cable / power cord / outlet. If none of these work, then you be dealing with a DOA (Dead-On-Arrival) product
If your monitor/s work on different systems and on all their inputs, then the problem can be from the physical ports on your computer or from the drivers which run on your Windows 8.1 device. Before we go about modifying BIOS settings or swapping out hardware components, do a thorough inspection of your operating system:
  • Make sure your Windows 8.1 system is up to date
  • Run Windows Update and install any missing updates
  • Check your video card manufacturer’s website for updated drivers. If there aren’t any, uninstall your current driver and re-install it with a fresh one downloaded from the manufacturer’s website
In the vast majority of cases, your issues should be resolved by now. A new driver and updated operating system is pretty much all you need to run multi-monitor setups on Windows 8. On the other hand, if you’re still experiencing problems and Windows 8 still doesn’t detect your secondary monitors, try the following:
  • Do a hard reset (for laptops) or BIOS reset
  • Test your video card on another computer, maybe some ports aren’t working as they should
  • Do a Windows 8 system refresh

Fix This: Windows 8.1 Doesn't Detect Secondary Monitors

A reaction:
For me the problem was after I did a refresh to get my system to boot, I no longer had dual monitor support. Turns out that the refresh in windows 8.1 wiped out my proper display adapter. After reinstalling the proper graphix driver 2 generic pNp monitors showed up in the device manager and all worked well so for me it was the display adapter needed to be the right one for my laptop in which I just went to the dell website and downloaded the drivers installed and rebooted and voila problem solved. Hope that helps