Problems moving site to another domain

Try adding the following script to index.php and make sure the line number and filename are showing.

Once this is working, move the script down until the blank screen appears again.

Perhaps also temporarily rename .htaccess file.

<?php // index.php

echo __file__ . ' : ' .__line__ ; die;

I added the lines right at the top of index.php and the result is still a blank page. Makes me think that the problem could lie on something fundamental.