Display does not work mac pro

Question

I tried connected 4 27" LG 1080p monitors to the mac pro (Late 2013), only two come on at a time no matter what ports i use. All the monitors have come on at least once but not all at the same time. Is there something I need to do? Also under system report it shows both graphic cards but the displays only show up on one card regardless of port. any ideas?

Answer 1

The warranty entitles you to complimentary phone support for the first 90 days of ownership.
If you bought the product in the U.S. directly from Apple (not from a reseller), you have 14 days from the date of delivery in which to exchange or return it for a refund. In other countries, the return policy may be different. If you bought from a reseller, its return policy applies.