Mutiple monitor setup not working after waking from sleep

Mac Mini 2011
Mavericks (10.9.3)
Monitor 1 Mini->HDMI Cable->Monitor
Monitor 2 Mini->Mini Display Port to HDMI Adapter->HDMI Cable->Monitor
Monitors are not the same size
Thw adapter is PNY (PNY A-DM-HD-W01)
Upgraded to Mavericks, second monitor works nicely. However, when waking the system up after it goes to sleep, the second monitor does not turn on. Further, the primary montior blinks every few seconds between the usual display and shrinking the windows to a smaller size. Unplugging the second monitor from the HDMI adapter cable stops the blinking, but connecting it again (even after waiting a few minutes) makes the blinking continue and the second monitor does not wake up. On reboot, all works fine again.

Hello chacham,
The article linked below provides some useful troubleshooting steps that can help resolve the issues you're experiencing with your display.
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT1573
Cheers,
Allen

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