I have a Mac Tower and I have tried to plug in two different monitors, 23 in and 30 in cinema displays and one Thunderbolt to WIFI to my TV and I am not getting a picture. I am thinking this tells me that my video card may be bad. Any ideas?
Which Mac Tower do you have, with what version of OS X?
Mac Pro Yosemite
20 Questions or something ? What hardware and video card?
Instead, just use EtreCheck and post the output.
http://www.macupdate.com/app/mac/48217/etrecheck
That will provide software and hardware information
how do I know if my video card is bad?
