I received my new MBP 2.53GHz on Halloween and used it three days with my Samsung external DVI monitor. It worked like a champ. Subsequently it would not fire up the external monitor. So I called Applecare and they sent out a new dongle, but no help. We tried reinstalling the software but no difference. So I was instructed to take my computer in for a likely logic board replacement. When I took it to the Applestore we determined that the 9600m *always* drives both DVI and VGA external displays, whereas the 9400m sometimes drives them, sometimes doesn't, and sometimes caused video issues (lower half only shows up on DVI, scrambled video on VGA).
After a lot of trouble I left it with them for full diagnostics and all checks out.
Anyway, the apple store genius phoned back and apparently there are problems with the nvidia 9400m chip that are being worked up at apple and will be fixed in a future software or firmware update. In the meantime, they're suggesting I put up with it and wait for the update because it is not solved by logic board replacements apparently.
Anyone else hear a similar story?
