Xerox XG-71D Monitor won't power on

At first the "brick" light would flash on and off. Sometimes more of a fading type of on/off. The on/off switch on the monitor just blinks. Bottom line is the monitor will not come on...Is this a power supply cord issue, or something wrong with the monitor? I don't want to buy a new cord if that is not the problem....And of course, hate to buy a whole new monitor....Is there anyway of knowing what the problem is before I start spending money?