Plugged in & connected but showing blank screen.

[Shorty]

I am running a 2012 Macbook Pro 13inch with 10.7.4. I have the 1.7 driver installed. I've tried different screens & DVI cables but still shows a blank screen. The monitor seems to recognise that it's connected but the Mac doesn't show the display. Any idea what the issue could be? Any specific troubleshooting steps I can follow?

[hawaiicpa]

I am running a 2012 Macbook Pro 13inch with 10.7.4. I have the 1.7 driver installed. I've tried different screens & DVI cables but still shows a blank screen. The monitor seems to recognise that it's connected but the Mac doesn't show the display. Any idea what the issue could be? Any specific troubleshooting steps I can follow?
I have the 2011 macbook pro 13 inch with a dell utrasharp u2212hm 21.5 inch monitor. My mac sees the monitor but the monitor is black even though it is on. When I turn the monitor off and then back on the monitor gives me the message "entering power save mode" and thens goes completely black. I down loaded the 1.8 driver.

[mrmengo]

I am running Mt Lion. MBP 15".
Appears that the it is working but the monitor is blank. Have tried uninstalling and re installing.... no luck.

Have attached logs.

This is a new product for me and I am not happy with it as of yet. :(

I have a lot of the following in the system log:
Finder[172]: CGSGetDisplayAliasList: Invalid display 0x2b2857d5
ALSPlugin 235.55[67]: ASSERTION FAILED: "err = 0x000003e8" cacheDisplayID line: 186
ALSPlugin 235.55[67]: Failed to get displayid