Some of the users of the Blackberry 9530 have reported that their screens do not wake up after dimming when upgrading to Blackberry Device Software 5.0.  This is a known issue and I experienced this myself.  I’ve tried wiping the device and reloading the software to know avail.  If your Blackberry experiences this problem, revert back to 4.7 and contact Verizon for a replacement phone.

http://www.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB19984