A few months ago my macbook stopped working with my external display, it had previously had no issues it was setup with MDP to VGA. Testing it on a few other monitors confirmed it was my macbook. I switched to using the MDP to DVI and everything worked great. Fast forward a couple months and I can no longer use my macbook on any projectors in our office I've tried multiple MDP to VGA adapters on multiple projectors I've even tried a DVI to VGA converter nothing works. I've run every update and no other mac's seem to have this issue. I'm at a loss any advice?