Add a default featured image on post

Just downloaded the theme and poked around. If you look at the bfa_post_parts.php which is in the functions folder, you’ll find on line #149:

if(has_post_thumbnail()): ?>
                <a href="<?php the_permalink() ?>"> <?php the_post_thumbnail(); ?></a>
				<?php endif;

You could change that to have an else as well.

if( has_post_thumbnail() ) {
 	<a href="<?php the_permalink() ?>"> <?php the_post_thumbnail(); ?></a>
	} else {?>
<a href="<?php the_permalink() ?>"> <img src="<?php bloginfo( 'template_directory' );?>/images/default.gif" alt=""></a>
 <?php } ?>

I would try that and see what happens.

I tried that but I pu the code like this:

if (function_exists('the_post_thumbnail') AND !function_exists('tfe_get_image')) {
		     if(has_post_thumbnail()): ?>
                <a href="<?php the_permalink() ?>"> <?php the_post_thumbnail(); ?></a>
				<?php endif; ?>

			<p><a href="<?php the_permalink() ?>"> <img src="HERE THE LINK OF THE PIC" alt=""></a></p>
		 <?php
         }
		the_excerpt();
	}
	echo $after;
}

But it puts the picture even if it already has a featured image. Also it shows on the top of the excerpt no of the left side as it would look with the featured image set manually.
1.How it looks if I put it manually:
https://prntscr.com/wrxu7
2. How it looks when I added the code:
https://prntscr.com/wrxx6
3. How it looks with setting the featured image manually.
https://prntscr.com/wry12
_______________________________________________________
Thank you for the help and the code, I really appreciate that :).

ever think about trying a plugin like ‘Auto Post Thumbnail’?