Primery Menu Configuration problem

For the ul part you should use this:

'items_wrap'      => '<ul id="%1$s" class="%2$s">%3$s</ul>',

%3$s is a placeholder for the list items, so you shouldn’t change it to “Laptop” as you have done.

These are the parameters for the id and the class, that need to go together with items_wrap:

'menu_class'      => 'menu_123',
'menu_id'         => 'mno',

Why it works like this? Answer is here:

Remove wrapping div and ul from output of wp_nav_menu