To assist the experts at this site you will probably have to supply a bit more info i.e. Make and model of the monitor, also what your system is cpu, graphics card, memory etc, if you have another monitor see if it will work with the pc, and then check with the experts on how to change the system to a standard VGA setup to see if that will work, or at least if you get another monitor to work, see if the new monitor is supported and if not try on-line for a driver.
phil
phil