Alt Text for images

Alt text of images in certain areas are being changed or not loaded. Instead of alt text created in media gallery, it is showing “1” or “Image” I tried replacing the images called by the theme with same images downloaded, installed in media library, and then alt text added but it still shows “1” or “Image”

How do I get my written alt text of image to show?

<section id=”slider”> = alt=”1″

<section id=”sec_consultation” class=”darkbox” style=””> = alt=”Image

<section id=”about” style=””> –><div class=”why_choose_us” > = alt=”Image

<section id=”our_clients” = alt=”Image