I have a Dell computer with a Nividia Quatro NVS 295 graphics card. I have been running dual monitors for at least a month and they worked perfectly. Then one day the secondary one went black. I restarted with only the secondary monitor plugged in to ensure there was not a problem with the monitor. It booted with no problems. With both plugged in I went into the display settings and the secondary one is detected for one second, then it is not. It keeps doing this detection then no detection every second. Can anyone help?