Function not pulling image or text from custom post type

Try this way, may help you. I just fetch from a specific post ‘s image from a specific Post Type called “gameshowwarriorsw”.

        $gameShowWarriorsWorld = new WP_Query( 'post_type=gameshowwarriorsw&orderby=date&order=DESC&p=371' );   
        while ($gameShowWarriorsWorld->have_posts()) : $gameShowWarriorsWorld->the_post();


        $postTitle = get_the_title();
        $postid = get_the_id();
        $postContent    = get_the_content();



    ?>

        <li>    <a href="#" onclick="return get_inzenwarriorhero(<?php echo $postid ; ?>);">
                     <?php the_post_thumbnail(array(219,143)); ?>
                </a> 
        </li>
    <?php 
        endwhile;
       wp_reset_query();
    ?>