Apple Cinema Display (20-inch DVI 2005) not working after 10.10.3 update

I have an Apple Cinema Display (20-inch DVI 2005) that isn't working after installing the 10.10.3 update. The screen is just blank, and the power light just blinks a few times every 30 seconds or so. I use this as a second monitor with my iMac (27-inch, Late 2012). Any way to fix this? Thanks!

Thank you for the update!
Next I would recommend the Reset the System section of the following article for additional troubleshooting:
Apple computers: Troubleshooting issues with video on internal or external displays
Reset the system
You can reset the Mac's parameter RAM and SMC.
Reset the resolution
Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
Start up in Safe Mode.
From the Apple () menu, choose System Preferences.
Choose Displays from the View menu to open the preferences pane.
Select any resolution and refresh rate that your display supports.
Restart your computer.
I would reset the SMC and the PRAM together, in that order one more time, then do the Safe Boot if needed.

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Hi I have a recent macbook pro 12" (bought in april 2012) model number A1278. I'm trying to connect to a 23" apple cinema display (A1082) this currently is not working - i've bought an additional Apple MB570ZA Mini DisplayPort to DVI Adapter - no luck!
im not sure what to do next - can anyone help?
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Message was edited by: v1ncen7

Apple Cinema Display (20-inch DVI 2005) not working after 10.10.3 update

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