Events, Infrastructure, and Reports show blank/white screen after upgrade

Hi All -

I just upgrade 3.2 to 4.2.3 on Centos 5.7 64 bit. 

It appears that my database was over written and the application is not functioning properly.  The events, infrastructure, and reports screen are just white/blank; almost they're loading.  At this point, I've starting going through the logs to find the problem but am not sure which log files I should start with. 

Any assistance would be greatly appreciated.

Thanks,

Kyle