Try disabling your modifications/plugins for now and see if you still have this problem.
Note: To temporarily disable the plugin system, edit includes/config.php and add this line right under <?php

I did that and I got the blank page and when I try and view forumdisplay.php I get this error

Fatal error: Cannot redeclare ty() (previously declared in /home/xxxxx/public_html/forumdisplay.php(1) : eval()'d code(2) : eval()'d code(1) : eval()'d code:1) in /home/oldfan/public_html/global.php(1) : eval()'d code(2) : eval()'d code(1) : eval()'d code on line 1


--------------- Added [DATE]1389042822[/DATE] at [TIME]1389042822[/TIME] ---------------

for some reason the files werent overwritten, now thats done I'm getting db errors.

http://www.metallifukinca.com/forumdisplay.php?11-VIDEO

I can login the admin cp. Is there a way to backup all members/posts/threads/ then delete and start over fresh?

--------------- Added [DATE]1389047425[/DATE] at [TIME]1389047425[/TIME] ---------------

Do you have to run the install files when upgrading?

You've been hacked.

I'd check your plugins for some added one and check your administrators and see if one has been added. You've deleted your /install directory, right?

When you upgrade, you run the upgrade.php script, not the install.php script.