The HP W1907 is a large computer monitor with a sleek LCD display. Like any electronic device, it can become damaged over time. You can open the case and try to diagnose the problem on your own. Opening your monitor doesn't require many tools or even much knowledge of electronics.
Power off your HP monitor and unplug it from your computer. Place your monitor face down on a sturdy work surface.
Locate the rubber pad at the top of the base stand, under two exposed screws, and remove it with your fingers to expose a third screw underneath the pad.
Remove the three screws from the top of the base stand and remove the base stand from the monitor.
Turn the monitor right-side up and pry the plastic frame that sits around the LCD screen off by the corners.
Locate the green key board mounted on the lower-left side of the screen and unplug the ribbon connectors from their ports on the board.
Remove the two screws from the board and remove the board itself.
Turn the monitor upside down and remove the four screws from the corners of the back frame. Remove the back metal frame from the monitor and set it aside.
Remove the four screws from the back metal panel of the monitor.
Disconnect the thick ribbon cable from its port on the back panel.
Remove the metal panel from the monitor to expose the back of the screen. The monitor is now open.