I currently have an XT with a 5153 color monitor and was considering looking for a monochrome display card plus an IBM 5151 monitor to use in a dual-monitor configuration. The 5151 pops up on eBay frequently, but the vast majority are untested. The color 5153 will present a blank white screen when powered on with no video signal. Should the 5151 display anything? I see some eBay listings indicate that nothing is shown when power is applied, and am not sure if that's normal. Without a PC, would there be any way a seller could determine whether a monitor works? I'm not proficient in CRT repair, so I'd prefer to locate one that's operational. Disappointingly even the couple listings that claim the monitor to have been tested with a PC don't provide any photographic evidence to back up that assertion.