When it comes to troubleshooting display devices there are two potential causes for concern. One of those issues could be software, or it could be the hardware. If you get a blank screen on your display for example, you should first check if your monitor is turned on. If that doesn’t work, it could be possible that the graphics driver is not the correct type, or it might be corrupt. If your display is really dark and hard to make out, you should check the brightness level and see if it is set to dim. Another cause of this issue could be that the device defaulted to a battery conservation mode that lowered your display’s brightness.