Thanks to both of you! I really appreciate the help. The advice definitely helped me focus.
It looks like running through everything again, permissions, password, etc. solved the issue! Not sure which change actually corrected it. The only changes I made to conf_global.php were to remove the prefix from both the 'sql_database' and 'sql_user'. And I thought I tried using both 'sql_database' and 'sql_user' without prefixes before, but maybe not? Anyway, thanks!