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System does not recognize 2 monitors

System does not recognize 2 monitors
« on: June 02, 2015, 09:08:55 pm »
MB GA-78LMT-s2p Rev5.  2 monitors connected to MB connectors, no 3rd party graphic card.  If I plug in only 1 monitor, it is recognized with name and model number.  If I unplug 1st monitor and connect 2nd monitor, it is recognized by name and model number.  It will not recognize both when connected.  One is DVI, other is VGA.  My goal is to run these monitors in extended mode, but with only 1 showing up, that option is not available.  Is this a PNP problem, a mother board driver problem or some other problem?  Belarc shows this to be an ATI compatible graphic card?  Tx for any suggestions.