Daniel Booher | Aug 5, 2013

Hammerhead VGA to HDMI

The Hammerhead is designed to convert VGA signals to 1080p HDMI signals so that you can use your HDTV as a super-sized monitor for your computer. It’s easy to set up and use, but sometimes there can still be some problems. Luckily these problems are usually very easy to diagnose and to fix. The most common issues we’ve seen people have with the hammerhead is when the computer is set to a resolution that isn’t supported by the HDTV.

This article will discuss how to properly set up your hammerhead and how to troubleshoot problems with resolutions.

Hammerhead Hardware


  1. 5’ 3.5 mm audio cable
  2. 2.5’ USB power adapter
  3. Hammerhead VGA to HDMI converter
  4. 8.5”male to female 15-pin VGA Cable


  1. Plug the included VGA cable into the computer and attach the other end to the VGA port on the Hammerhead.
  2. Tighten the attachment screws on the Hammerhead VGA port to ensure a secure connection.
  3. Plug the USB cable into a free USB port on your computer and plug the opposite end into the mini USB port on the side of the Hammerhead. This ensures the Hammerhead is powered.
  4. Plug the 3.5 mm audio cable into the headphone port on your computer and plug the other end into the 3.5 mm port on the end of the Hammerhead.
  5. Attach an HDMI cable to the HDMI port on your HDTV and attach the other end to the HDMI port on the Hammerhead.
Hammerhead Installation


Troubleshooting the Hammerhead

For your Hammerhead to work, your computer must be set up to duplicate or extend to a second monitor, and it must be using a resolution that is compatible with your Hammerhead and your HDTV. To set up your Hammerhead to work with your computer and your TV:

Hammerhead Setup
  1. Right click anywhere on the desktop and click “Screen resolution.” A screen will appear with display properties.
  2. Select the second monitor.
  3. Set the monitor to “extend” or “duplicate” the displays from the bottom menu.
  4. Change the resolution using the dropdown menu.

Note: Only some resolutions are supported. Pick one that is supported by the Hammerhead AND your TV. See below for a list of resolutions supported by the Hammerhead. See your TV owner’s manual for resolutions supported by your TV. You may need to enable your graphics card to support multiple monitors. For more detailed help with graphics cards, select the manufacturer of your graphics card:

If your Hammerhead is still not working, or you need help getting it set up properly feel free to contact us:

Supported Resolutions

  • 640x480@60Hz, 640x480@72Hz, 640x480@75Hz, 640x480@85Hz
  • 720x400@70Hz
  • 800x600@60Hz, 800x600@72Hz, 800x600@75Hz, 800x600@85Hz
  • 1024x768@60Hz, 1024x768@72Hz, 1024x768@75Hz, 1024x768@85Hz
  • 1152x864@75Hz
  • 1280x720@60Hz
  • 1280x768@60Hz, 1280x768@75Hz, 1280x768@85Hz
  • 1280x800@60Hz, 1280x800@75Hz, 1280x800@85Hz
  • 1280x900@60Hz
  • 1400X1050@60Hz
  • 1440x900@60Hz
  • 1600X1200@60Hz
  • 1680X1050@60Hz
  • 1920x1080@60Hz
  • 1920X1200@60Hz

Setup for a Single Display

If the only display connected to your computer is the TV, Setup may require an extra step. If the TV is expecting a different resolution than what the computer is sending it, it will display an error message or have no picture at all.

The solution to this problem is to boot your computer in a lower resolution that the TV supports, then change the resolution to a resolution that looks good. To do this:

  1. Restart your computer.
  2. As it is starting up, tap F8 continually until you see the advanced options menu.
  3. There will be several different options on this screen, which will look slightly different depending on your version on Windows. Select the option that says either “Enable VGA Mode” or “Enable low-resolution video” and press enter.
  4. Hammerhead advanced troubleshooting

  5. Windows will now boot in a lower resolution that can be displayed on virtually any screen. Follow the instructions in the Setup section of this tutorial to set the desired resolution.

Note: Make sure you select a resolution that is supported by the Hammerhead and your TV. Check the Supported Resolutions section of this tutorial for a list of resolutions supported by the Hammerhead. Check your TV owner’s manual for resolutions supported by your TV. For extra help, feel free to contact us.